Advice please: My period was due on Monday but still not turned up and I've never missed one before. Wednesday morning a did a test and had faint lines, not sure if this is a positive or not? My peak ovulating period was only 13 days ago so might wait until next week to test again, maybe with a Clearblue digital one? (which I did do on Monday evening but it said not pregnant but then all day I'd just downed water as I was so thirsty!) I'm thirsty all the time, having hot flushes, get a full/nausea feeling after eating. Any advice gratefully received, I'm 
as to the best course of action.