I'm now 5 days before expected af, my boobs are killing me, I feel nauseas and I'm always so thirsty I can't seem to get enough to drink. Could it just be my nerves? I want to take one, but I'm so afraid of that bfn. And will a cheapo test even work this early? Not sure I want to pay the extra for a chance of bfn. We've been trying for close to a year now. Idk what I should do...