I don't know what's going on with my body.?

For the past 2 weeks I had most of the pregnancy symptoms as well as a distinct feeling that I was pregnant. Then I've missed my period for four days. On day 5 I started to spot for 2 days but now I have a really heavy period. Yesterday I've also started ping small blood clots. I have a constant numb cramping in my lower pelvic (which I only get on day 1 of my normal period) and I am soooo tired. Two days ago I when the heavy period started I was sooo dizzy-the room literally spinned the whole time! This morning however, I am nauseas and I still have tender . I have not taken a preggo test becoz I thought I would wait and then this happened. What is going on? I am scared. Thanking you in anticipation for your answers.