Pregnant on the pill?

Sara • Gnzlz.Snchz
It's a long post but please bear with me: This is my second month taking the pill  but lately I've been having an odd feeling that somethings not right. A couple days ago I asked a question and a nice lady told me that it could be just side effects, but I have the urge to consult again. On my first month of the pill my boyfriend and I had sex on day 7 of the pill without protection, that month we got a little too excited about not using a condom. That whole month u felt nauseous and had small cramps through the month but ignored it, I got my period and dismissed the idea. This month we've had unprotected sex a couple of times and I've been having an odd feeling. I still have cramping and nausea as well as lower back pain and mood swings, and yesterday I started spotting and got so dizzy I had to hold on to a chair. Like I said, I haven't missed a period so I don't know if I'm freaking out in vain. Please help and sorry for the log post.