Whatever way is comfortable for you to have sex, you can do it that way.
i am FTM mom n im 30 wks n my husband n i still have sex at first when ur early u have to take it slow but once the wks go by u can do normal like u used to but being careful everytime. I enjoy it n u have to think at the end will be better for u so u can open ul tht cervix. Good luck momma
Having sex doesn't hurt the baby. Hes just fine ! :) so don't worry. Only worry if you bleed during or after sex