I’m late. Very late! My period was due four weeks ago. Exciting…except I’ve taken four pregnancy tests now, all FMU and all taken after AF was due, and I’ve had four BFNs. I’ve tried clearblue, superdrug and tesco, so it isn’t like it's a fault batch of tests or anything.
I don’t have any obvious PMS symptoms. I’m starting to get a bit of nausea, which feels like my previous pregnancy, but then again I’m pretty darn stressed over the negative tests and missing period so I might just been anxious-nauseous 
Help! What do I do? Why am I testing negative well after hcg levels should be detectable??
(I’ve already tried the GP but they said to come back if I miss my second period.)