Nothing wrong in wishing to work as a doctor especially when thousands of our females need female doctors to treat them. Even if you get married after medical graduation, you can work as a doctor and there is no contradiction between marriage and working as far as you organise it with your husband.
If fasting harms her health or the health of her embryo, she is then not allowed to fast.
It is good to be a scholar, and it is good to be a doctor. Society needs people do to all the different jobs, or else it wouldn't function. Ideally, it is good for you to do the job that you are most talented at and most committed to.
It is narrated that the Prophet (S) said: ‘Knowledge is of two categories:
knowledge of religions and knowledge of the physical body.’ So this narration celebrates and values both kinds of knowledge (religious and medical).
(Of course there are other important jobs and fields of study as well!)
As you know, there are many narrations from the Prophet (S) and Ahl al-Bayt (A) about various medical ailments, so it was clearly a subject that was important to them. So inshallah you are also following in their footsteps by being a doctor.
Serving and helping human beings anywhere they live is a great deed of reward in Islam. Even helping animals in need is an act of great reward in Islam. Working as a doctor who helps men, women and children from any faith for the sake of Allah, is a great deed of reward. The Prophetic Hadeeth says: Best of people is he who is more beneficial to people.
Sorry to hear about your condition. If you need medical care, you should get medical care.
If you feel unable to tell your husband and need financial or practical assistance, maybe a friend, relative, or charitable organization can help you.
With duas for your well-being.
The Islamic rule is same for any medical treatment including dentistry which says that female is not allowed to be touched by a male doctor except in emergency when no female doctor is available. Muslim female should go to female doctors only even in dentistry.
Muslim is allowed to study any system of medicine as far as it is a medical science with out any additional non medical opinions. Non Muslims' opinions are not part of the medicine but their way in understanding or dealing with it. We study the medical science and leave the non Muslim myths. Our Muslim history has evidence that we take medical knowledge and other worldly sciences from any expert being Muslim or non Muslim. No doubt, we have great treasure of medical knowledge in thousands of narrations and sayings of the Prophet (SAWA) and Ahlul Bayt (AS). That does not stop us from studying any other source of medical knowledge.
When you touch a cold dead body directly with out gloves, Ghusl of that touching becomes obligatory on you. If you can not perform Ghusl, then Tayammum becomes obligatory on you.
If he needs to take necessary medicine during the day, then his fast will be invalid and he must keep it later as Qadha.
Islamic rules forbidding seeing or touching other gender (Non Mahram) are very clear but exceptions come if there is a real necessity to save life. Necessity must be assessed and the exception should meet no more than the necessity. Any act more than the real necessity is not permissible.
As far as I know in the UK the hijama training centres are run by Sunnis. I know a Shi'i person that studied and is certified as a practitioner through one of these clinics. There are hijama clinics in Iran, e.g. Tehran and Qom. The interest in natural medicine and tibb is rising in Iran. If you are based in the West there should be at least one hijama practitioner in a city near you. If you prefer something that is specifically established through the Shi'i tradition, this is a link to an article compiled by several practitioners. Their contact details are on the article: https://reader.elsevier.com/reader/sd/pii/S0254627217301644
There are many institutions of medical sciences according to Islamic traditions. You can find them in Iran, Iraq, Pakistan and India.
You may contact whom you know in any of these cities to get you details.