Hello,
It is better to avoid intercourse at 8th month. You can do sex by 5 to 6 weeks of pregnancy but try to avoid it during 6th to 12th weeks because it may cause miscarriage. During 4th to 7th month you can also practice sex with doctor’s advice. But sex should be stopped completely during last two months because at that time it may cause premature rupture of membranes leads to preterm labor.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
It's safe to have sex with your boyfriend as long as you are not cheating on your husband when you do it.
My doc ok'ed my having sex through the entire pregnancy, except when I had some bleeding in my 8th week.