Is it possible?

Sinora
My boyfriend and I have been TTC for a year now. This month AF was due on 9/5. I took two tests before n they were BFN. I still haven't seen AF. I tested last night n I could've sworn it was a very very faint second line but I'm afraid that's just what I wanted to see so I thru that test out. This morning I tested with one digital test and one reg but got both neg. Could I really be pregnant but got negatives because I drank so much water in the last couple days? Last night I drank a whole bottle RIGHT before laying down in bed....literally getting into bed