Clomid, IUI #2 & Progesterone

Ashley • 28 // married to my best friend January 2015 // ttc baby #1 with unexplained infertility
This cycle we did 50 mg of Clomid days 4,5,6 with IUI on February 10th, day of ovulation. We had two mature follicles and both released. Since then I've been on 200 my of progesterone 2x a day. This past couple days I have been feeling the constant need to pee. And when I do, sometimes it's abnormal amount but sometimes it's very little. It's doesn't hurt so I don't believe it's a UTI. I'm wondering if any of you ladies have been on progesterone and had this side effect, of it it's maybe an early pregnancy sign?
I am currently 10 dpo and tested this morning with a BFN but I knew when I went to test I most likely wouldn't get a positive even if I am pregnant. 
Thanks!