Pregnant or sick??

Ok, girls! I had sex on the 8th, spotting on 10th and started feeling odd cramps in my lower abdomen on the 16th and the odd feeling cramps haven’t gone away. I also keep having back pains, nausea, my boobs are sore, and can’t sleep and when I do sleep I have crazy dreams. I took a few test because I’m almost a week late but every test has been negative.

What’s going on? I’m worried that I might just be sick? The feeling in my stomach is so odd! Almost like things are shifting and moving and cramping.

I feel like I’m going crazy. Any one else experience this?