I have been diagnosed with Generalized Anxiety Disorder and have self-diagnosed myself with OCD as well. My OCD had gotten a good deal better before I got pregnant, but lately I have had to check several times to make sure my doors are locked, that the oven is off, that nothing is left plugged in that isn't supposed to be. Only to worry about all of the above listed later on during the day regardless of how much I checked.
I think, though, that the anxiety of being pregnant is really what is magnifying all of these feelings. Also, I imagine the raging hormones aren't helping either.
I know how hard it can be to worry constantly, and I know how hard it is to find someone who understands (my husband definitely doesn't - just tells me "not to worry" which I know is much easier said than done). If you ever feel the need to chat, I'm here. Just try your best to take one day at a time. That's really all anyone can do.