I JUST finished my period a week and a half ago.. and a few days later started getting an abnormal amount of yellow-ish white very liquidy discharge. I have NEVER had discharge like this before, actually even had to wear a pad. I also had a dull ache in my very lower abdomen while I had the discharge, but that has gone away since yesterday. Then just today I started bleeding!!
More about me: I went off my birth control about 8 months ago. I have been sexually active but have used contraception. My periods have been relatively normal, every few weeks or so, since I went of my birth control.
Might this be a pregnancy-related thing? What is my body trying to tell me? Any insight would be valuable... I am a bit worried and can't afford to go to the doctor.

I have no idea, but the pain is a worry - discharge, plus bleeding, plus pain - I think that it would be a good idea to see a doctor. ANY irregular or unusual bleeding should be seen by a doctor. I'm not sure that you can afford to ignore your health.