27 Days Past Miscarriage

I am 27 days past miscarriage. I was 7 weeks when it happened. At first, I kept taking pregnancy tests to watch my levels go down, but I quit about 2 weeks ago when the lines had become barely visable. My husband and I had sex twice in the past 3 weeks. Yesterday I started getting mild, pinching cramps. Not like a period. I took three pregnancy tests and they are all faint, but positive. Is it more likely that I'm still positive from my miscarriage (nearly 4 weeks ago) or that there is a new pregnancy?