Progesterone Mood Swings

Cassidy
Hey Ladies!  Does anyone else have any experience with taking progesterone and it causing irritability and moodiness?  I have really noticed a difference since I started the suppositories. I haven't called my OB yet, but it is listed as a side effect on my sheet. Ugh. It's hard to tell if it's the medicine, the being in bed rest, or the overall being pregnant! Probably a combo! 
Thanks!