Sexual

Qamar dar Aqrab refers to the moon being in the zodiacal sign of Scorpio which happens 2-3 days per month (in that the moon circulates through all the zodiacal signs in one lunar month) and can be determined via astronomical software or eyeballs.

Historically, in a number of cultures, this has been considered an unfavourable time, which is probably why it appears in our heritage. There are some narrations on not marrying or starting a journey at this time, but they are not considered strong.

Some people choose to avoid scheduling marriages at this time, and that is fine. It is also fine not to pay attention to it at all. People vary in their belief in these things.

However, it is good not to get too caught up in these things, e.g. if someone gets married at this time, it doesn't mean that it will be a disaster. Sometimes if we feel that something has a bad "omen", it becomes a self-fulfilling prophecy because then we subconsciously do things to make it go badly, and that isn't healthy at all! 

If something happens by accident (for instance, conception), there is no need to worry. Allah knows best what He creates and when, and He has his wisdom for it, especially when it comes to bringing life into this world, which is in His hands.

Of course, it doesn't hurt to give sadaqa a few times if you are concerned, but it isn't necessary. Don't overburden yourself with it by making it a requirement!

Yes

This happens sometimes.

It is your decision whether to stay in the marriage, or pursue separation.

Some factors to take into consideration are:
* whether or not you hope to bear children
* how important physical intimacy is to you (it is important to most people, but some people choose to remain in a marriage without physical intimacy)
* whether you fear you might fall into sin in this type of situation
* whether the marriage is working out in other ways (such as emotionally or practically - with emotional considerations such as, do you love each other, are you dedicated to each other, do you feel bonded with each other, do you feel like a family, do you have future plans for yourselves as a family that you are both working towards, etc.)

Often in these cases, where there is an absence of attraction from one side from the beginning, the underlying relationship in the marriage fails to develop and the relationship breaks down (whether that results in actual divorce, or just living like roommates - usually with a fair degree of tension - or just a marriage on paper).

This is unless there was a prior agreement to have a marriage with little or no physical intimacy and they have other reasons why they want to be together and the marraige works for them.

Maybe your husband might also have a sense of what should be done - it is ideal when it is joint decision.

Sorry to hear about your challenging situation and wishing you the best.