I HOPE SOMEONE CAN HELP..

This is going to be a bit long as well as maybe a little confusing, sorry for that.

Last month 4 days before my period I took pregnancy tests almost everyday, yes I'm one who has to be 1000% sure about things, the first was negative then the rest after that was positive. Well the night before I was supposed to get my period I started cramping and then roughly afternoon time I ended up starting off bleeding. What's weird is that I never start my periods a tad bit then gradually they pick up, also my periods last 3 days heavy and 3 days spotting. This period was 6 days medium bleeding. After that the next day I had this clumped up discharge it was white with bright red blood and pinkish tinted. Not sure what that was. Any who I still have pregnancy symptoms and I don't want to keep my hopes up that my body is just being weird lol and I'm still pregnant. So the question is could I possibly still be pregnant? I took 3 pregnancy tests and 1had a extremely faint line and one I thought was a line but not 100% sure and the 3rd was negative. Oh and night that all happened I took a test the next morning and it was negative. I am terrified of doctors lol so I wanted to see if anyone had something similar happen or if a nurse is on here and could possibly answer. Also I have been lightheaded and having headaches and dizziness for 3 days now and the only time that's ever happened is when I was pregnant.. #momof4..