Supplements and False Positives?

I'm 40, and with my FSH was told we had about 5% chance to conceive naturally. I've started taking CoQ10, Omega 3, and DHEA. I'm on cycle day 37 (usually 28-33) waiting to start my fertility cycle for IVF. Out of sheer randomness, (self torture?) I took a test and it came out positive. I'm completely confused because we were not supposed to be able to do this without help. Could this really be happening, or could the supplements be causing a false positive? I did the forbidden Google search, but I'm not sure how I should be feeling? Any advice or thoughts would be appreciated!