Anyone Use Wondofo Strips?

So I had a miscarriage Feb. 11 and bled until the 18th. I decided to keep track to see when I was ovulating because I read you could start ovulation as soon as 2 weeks.I have traits of PCOS (they didn't diagnose me with it, but they said I have the traits) Well all of my ovulation tests keep.coming back negative.I also took a few pregnancy tests to make sure I didn't still have any HCG left and they were coming back negative. I took the Wondofo pregnancy test on the 3rd of this month and 1 came back positive, took another one and it was negative. I took one today...positive. I actually took like 8 or 9 today and I can see some faint lines in some and others I can't. Could these be false positives/EVAP lines?

Update: Took 2 equate pregnancy test today and they both came back positive. Took 2 Clear blue, one digital and the other regular, both came back negative...ugh.