New pregnancy or left over hormones


I miscarried naturally on 28th of July, it's been a month and I've started to have pregnancy symptoms, nausea, stomach pains, swollen boobs. I've done tests they're coming up with a faint line, is this left over hormones or new pregnancy?

The top test (5.1 weeks) is taken after I miscarried, the second test was taken 4 days ago, and bottom test was taken today. Please help it's driving me crazy!