Hi mommie, congrats. Yes you should be able to have sex, as long as you don't have any other conditions that would cause a problem (ie. incompetent cervix). Baby should be fine the full 40 wks.
You can defiantly have intercourse. The baby is so small at 3-4 weeks plus the baby is protected!!!!
It's fine! Do it now ...in another 30wks you'll be uncomfortable and may not feel like it
Yes!! perfectly ok as long as you feel ok to do so its fine the whole pregnancy. Unless your Dr puts you on pelvic rest.