I need opinions

So Tuesday and Wednesday I had faint positives, progressing, but not super strong. On Wednesday I started getting painful cramps and I was light headed and extremely thirsty and exhausted. The cramps stopped, and I started bleeding very lightly, but maybe more than spotting. It stopped that night. The next day I used a cheapie test (I was out of the good ones) and it was lighter. the bleeding increased to essentially normal flow, so I assumed that it was a chemical. I didn't get any cramps though, and the bleeding just totally stopped last evening. I threw a tampon in figuring it would start back up overnight, but it didn't. Tampon totally dry. Not a speck of blood, and still 5 hours later today, after exercising even, still not even a tinged cm. Any ideas what could be going on? I don't even feel like I'm going to get my period...