Discomfort during sex

Renee
Hi all! Have a bit of a tmi question: has anyone or is anyone experiencing discomfort during pregnancy? This is our second baby and with the first, sure things were uncomfortable sometimes, but we were still able to maneuver around to have enjoyable sex. This time is different. It's not painful exactly, although sometimes it feel like my husband hits a spot that makes me cringe. More like it's just not comfortable to the point where it doesn't even feel good and I end up getting really grouchy. 
I do plan on talking to my doc Thursday, but wanted to ask if anyone else experienced this? Really a downer considering we didn't have this issue the last time :(