Ouch :(

So, I'm 18 weeks pregnant and I haven't exactly had the urge for sex. But, I know men have their needs. My boyfriend and I did the deed for the first time in a few weeks, but this time I feel like it was my first time. Everything hurts! I'm so chafed and sore :( it makes me not want to do it again. I was in the mood for it, but not like normal, you know like "ok, yea we can" not like last time where I was right turned on and horny. Has this happened to anyone else? Could it just be hormones messing with my "natural" way and natural lubrication?? It just sucks I feel like this now.