Irregular periods, and testing for Pregnancy

Hey, My name is Kayla, since becoming sexually active years ago my cycles have been irregular, they only time they weren't was when I was on BCP. I haven't been on BC for over a year now and I've had unprotected sex in the past year, but have only had maybe 6 periods. In the past month, my boyfriend and I have had unprotected sex every day at least once a day, I know it kind of sounds funny but we aren't TTC, we are open to it. Obviously without using any form of contraception we could be considered TTC, but any way. The last day of my last period was January 5 2013, the first day of my last period was around the first of the month. I've been having some mild symptoms that could be PMS or Pregnancy, I've been taking naps (which I never do) and had some light cramping, a spell of nausea every now and again and a strange feeling in my breast that is similar to the "let down" feeling that I got when I was BF'ing my daughter. When I got pregnant with my daughter I had no symptoms of pregnancy and only found out I was pregnant when I went to the Doc to be put on BC. I was 15 weeks and 5 days along when I found out. I'm worried that I am being paranoid, but I don't want to let it go and end up finding out down the road and risk something happening, but I'm so worried about taking a test because I don't know when I should have gotten my period and I don't want to test too soon and get a false negative. Any one have any suggestions as to how long I should wait before testing??

I was this way after having my DD....only had 3 periods in 8months. Anyway i kinda just had a feeling and tested a month after my last period and it was positive. My guess would be like in a regular cycle there would be enough Hcg to show up on a test after a month

Thanks, that's what I've been thinking, I'd really like to find out that I am in fact pregnant, but it really just stinks every time I miss a period and I'm not pregnant I wish I was just normal, so I would know and their would be no guessing. But thanks again for your input!  

No problem