What Do Vaginal Discharge After Periods, Dizziness And Bloated Stomach Mean?

I have irregular periods but I always had them at the end of the month and past two months ive been having vaginal discharge before and after periods I'm worried because ive never had this before and period were 2-3 days long if I'm pregnant I could be 10 weeks I mean I have head aches and dizziness this is weird but I can feel weird thumping movement in my stomache my left side is kinda bigger too please anwser I'm 19 & worried /scared bout talking to my doctor or my parents.