Hello there! I have to say that it's been a challenge for me to be able to be intimate w/my husband; however, we've tried to make it work. I'm 30 weeks pregnant and I am the queen of heartburn/acid reflux I get it just about everyday! I would say obviously dont have sex while having heartburn, never tried it myself, but i'm sure it'll be more uncomfortable if you do. But when you two do get in the mood and you wanna try, definately dont let your belly get in the way... you can get on all fours and have him go behind you, you can lay on your side in a spooning position (the best position-i've tried), or even depending on how big you are he can even be on top of you (minus the chest to chest contact). One position that you can also try is you being on top of him, this one doesnt work for me as well being as though I get shortness of breathe real easy.. I wish you the best and I hope this helps!