Very disappointed

I just got my bfn... and I really don't understand it. Af is supposed to come tomorrow and 13dpo... I have so many symptoms that I don't get with pms, I'm nauseous, my breasts hurt worse than they ever have (even have a very little amount of liquid coming from my nipples witch I've never have), I have a headache every day for at least a week and a half... any help or feedback would be very helpful