Post-Baby Relationship

Okay, so I went out on a limb and decided to come and post here seeking advice or input or others that are experiencing a similar situation. My husband and I got married in April of last year. We had already been engaged as of Christmas 2016, but when I got unexpectedly pregnant the following year, we got married so I could have insurance while going to the OB. We had obviously planned on getting married anyway, but I had hoped to be planning a wedding before a baby. It’s okay though because I believe it all happened this way for a very good reason, and we are in absolute love with our first (and possibly only) child together. Fast forward to now and our baby is nearly three months old. We’ve seemed to be having issues adjusting since obviously a baby requires a lot of care and attention (we each have one child from previous relationships, but they’re 6 & 7 years old so it’s been a while since we were accustomed to having a baby around). It’s seemed to have put a wedge between us and a definite damper on our sex life. We were once a very sexual couple, but for quite some time now I find myself just not in the mood and not even into the slightest sexual connotation. My husband, on the other hand, still feels very sexual and has went from making advances on me to kind of just giving up after we have had a few conversations about it and where I’m at/how I’m feeling about it all. Still, I don’t think he fully ‘gets’ my emotional state, the stress I’m under (my six year old has autism and we have a three month old), and just how exhausted mentally and physically I am. He tends to think it means there’s something wrong with our relationship, that I’m not attracted to him or I don’t love him as much, when none of that is true at all. I don’t know how to make him feel otherwise (I tell him as often as I can...I think) to where he isn’t so insecure and upset about it. I admit it bothers me at times because sex is so important to him, almost like a deal breaker but not quite. I just don’t know what to do and I don’t want our marriage to fail just because I don’t feel like having sex after having a baby. Has anyone been through this? Does anyone have any advice?

Thanks in advance and I hope everyone is having a wonderful day.