I have had similar to you I ovulated 2 weeks ago today. For the last 4 days I have experienced bloating, really bad mood swings, emotional, feeling slight nausea. With this in mind I was convinced it was the dreaded period- HOWEVER thursday night (2 days ago) curiosity got the better of me and I did a first response HPT and there was a very faint positive, I did two more and got the same reading. Next morning (yesterday) got another faint positive on a first response so brought a clear blue and got a BFN. I rang the docs they made an appointment for that afternoon where he didi a test BFN so he took bloods which have come back from the lab today as inconclusive, he said it was not a negative but levels may not be strong enough to show a strong positive but he doesn't know so he wants to retest my blood on monday???