Low libido since becoming pregnant again

This is my third pregnancy (2nd viable) and with my first I was all over my husband all the time up until the close to the end when it was just so uncomfortable but this time- my libido is like 0….. it’s NEVER been like this and I feel awful about it. He’s a wonderful daddy and husband and I love him so much so it’s not lack of affection or anything on his end- I’m just a buzz kill. A while back he thought I was just not into him anymore and that just broke my heart cause it’s not true at all.. We do it- but I’m not necessarily into it. But I do it to make him happy. I used to LOVE making love with him all the time and I mean I still do in general but since becoming pregnant this time it’s just not the thing for me right now. I’m 13 weeks so I’m hoping my hormones will start to balance out and my libido will go back to normal because I hate feeling this way. I want to want to do it… what can I do to help?!?