Tiredness and an inability to concentrate. Did a FRER test - bfn. Assumed I wasn't pg but then a couple of weeks later I was eating fish and chips and I looked at the chip, felt really queasy and said to myself, "you're pregnant!" Tested again and yep, I had a little DD growing inside me ( can't believe I just started crying typing that )

Eta: I was about 7 weeks when I did the second test.