advice and a vent

Let me start by saying that I love my husband, there's no doubt about it. I truly do. I'm also 35 weeks 3 days pregnant with our son. My husband and I have been together for 3 years and married for 2. I've been fine this pregnancy and he's been ecstatic. This is his second child but basically like a first as the previous mother wouldn't allow him around during the pregnancy and refuses to allow him around him growing up. So, understandly, he's excited and experiencing things for the first time. That's not my issue. The past few months, I've hit a wall. I just feel blah. I've lost the desire to be affectionate. I went from waiting and having sex with my husband daily to its basically non-existent not for lack of his trying. Everything aggravates me. I can't stand being touched on constantly. kissing is a pain in the ass and I feel horrible. I am obviously fully aware that I am behaving this way and quite literally pushing my husband away and he's continuing on. Tells me daily he loves me, I'm the love of his life, he is affectionate, nd yeah he's amazing and I'm acting horribly. I don't know what to do. I imagine that I'm suffering from depression, as I have a history of it but haven't had any symptoms for years, and I have a history of post partum. I'm just at a loss. I feel so bad but even when I try to catch myself or push through whatever "annoyance"... I can't. I guess I'm just needing to vent and see if anyone else feels this way or felt this way. I just want things to go back to normal and for me to be able to be happy again.