I'm soooo confused. I mean sometimes I think I pregnant and sometimes I think I'm losing my mind. I had intercourse on Feb.8. I have no idea when I ovulate-- in fact, till now I didn't even think that I did ovulate due to PCOS. So if I am pregnant I guess I would be like two weeks? I have no idea about this stuff! Anyway, one week ago I took 25 sensitivity test and came out with a positive after several negative tests. But when I test with another brand (more expensive) at 20 sensitivty it comes out negative. I do the tests in the morning. I live abroad and am not sure of the test brands- I think they're German though. Why would I get negatives on a test that should be more sensitive?