Bfn but sure I'm pregnant! Help

J

I've been pregnant twice before but I'm sure I am again but I cannot get a positive test I was due on , on Sunday and my nipples are so sensitive and the outside have turned brown🙈 I also keep tasting metal! I was walking round toys r us this evening and went all dizzy! I no I'm pregnant I've had two boys which I tested pregnant both time, what shall I do?