Yes
it's possible.
It is possible, but extremely unlikely.
Yes. Sort it out mate.
Yes, it's very possible.
This is unlikely, although it could be possible depending on when you ovulated.
you have a very small chance because the main time you get pregnant is during ovulation which is the 14th day after your period, usually.
Only if you use protection. It's possible to get pregnant at any time.
It depends on what you mean by "safe intercourse." In using any method of birth control there is always a potential of getting pregnant. Nothing is 100% effective except for not having sex. So, yes, there is a possibility that you may be pregnant.
Yes. it is possible. A woman can have a few periods or even regular monthly periods during pregnancy.
If you get your period you aren't pregnant.
Weight gain is irrelevant during the first trimester. If you had intercourse and missed a period pregnancy is possible.