All mixed up (no judging please)

Abigail
This year I was diagnosed with PCOS. To most people my age it's not a big deal, but my boyfriend d and I want kids when we're married so bad. He says to not worry about it, but it's so hard, because even before I found out I had convinced myself that I wouldn't be able to have kids. I've even done some pretty stupid things because of it. 
​ Recently the last couple of times we've seen eachother (he's in the military, so right now it's about once a month) we've had sex basically unprotected (I was technically on birthcontrol but the 1st time I had just start the day before and the second I was on antibiotics... Both of which he didn't know about). Both times my period even came late.
​Over the weekend (April 19-20), I visited my boyfriend for my birthday, and as expected, we had sex. (My birthcontrol  had ended about 2 weeks ago -again him not knowing-  and didn't use any protection at all. 
​ I know what I did was terrible and I feel awful, and I know that right now wouldn't be the best time be pregnant, but I a part of me wants to prove myself wrong. I'm despriate.
  Is it weird that I get so disappointed when I get my period? What's your take? 
​                  (Please be nice)