I haven't had my period in 2 months, but I'm irregular so that doesn't worry too much. Also I'm on birth control bills. But lately I've been tired all the time, I go to bed early but can't wake up on time... I come home and go right back to bed. My breasts have become very sore and I have to urinate twice as often as I normally do. I have experienced dizzy spells and feeling nauseous also.

Either you go to see a doctor (recommended), or you take a pregnancy test.
Do not rely on remote diagnoses on the Internet for this, the issue is way too important.

Were u pregnant? Cz the same thing is happening to me right now and I don't know what to do