Opinions PLEASE?! What's happening?

So I got my bfp on 6th of July. Then on the 7th thru 8th I bled pretty bad. Like as in clots and all. Thought it was a chemical. Went to the doc again on 13th of July as I was still getting positive tests. Confirmed pregnancy and did betas. Betas more than doubled in 24hrs...sooo that brings me to this past weekend and I was spotting but nothing to worry about according to the doc. Well now my pregnancy tests are getting lighter and the weeks estimator went from 2-3 down to 1-2. Do you think I miscarried or maybe my levels are so high the tests aren't registering? I'm so upset. I literally just started getting symptoms which is why I wanted to test again to see the dark dark lines...but no.