TTC, missed period, negative test(s)

[Indesit]

OK, so well confused. TTC, and this month no period - 1 week late. However, have taken tests, and all negative.
1st test was a bit early, mid afternoon.
2nd test didn't work (no control line)
3rd test was Sunday morning, negative.
4th test was yesterday afternoon, negative.

Any idea what might be going on here? Am I pg (I want to be...) or not?

Other symptoms: feeling sick from time to time. A week ago had very sore and 'full' (feeling) breasts. I also have a light discharge (in a normal, non-threatening way - like I had when I was pg before, I think).

Saw GP, he said wait another week.

I only tested + this time 10 days late. I thought I was pg after about 8 days late as I had a funny taste in my mouth and had sore breasts. Had a negative test at that stage though. It's a waiting game I'm afraid. Good luck x

Thanks! I can accept not being pg (well, just about, after protest ) but I'm struggling with the possibility with no proof, IYSWIM!
I hope, I hope, I hope... If not, crikey, my body is mean!

Maybe do another Fri morning? Can get cheap tests from poundshops or Asda ones are sensitive and only £3.60 for 2.