Mods, please feel free to move....

I have no idea what is going on with me. AF was due on 15 August but we still have a no-show. And I have taken SIX HPTs (the last being this morning) and all 6 were BFNs. I have been super regular in my cycle up until now.

The difficult thing is that with pg 1 and 2 I had very few, if any, symptoms during the first trimester. That said, I have felt oddly dizzy, occasionally nauseous, had a tender tummy and been visiting the loo more often (I think!)

I've googled chemical pregnancy and don't think its that because usually women get a positive on a HPT, yes? Could it be an ectopic preg? I have a doctors appointment this Saturday to try and get to the bottom of what is going on but wondered if anyone might have some ideas? I am just getting frustrated because I see this as something which is stopping me from getting on with the business of TTC#3....

ETA : I had BFNs with both boys, but much earlier on that this.