15DPO, AF 3 days out

I was having some symptoms the last week or so, nausea, irritability, sore breasts..   now I'm really not having anything...   I woke up in the middle of the night with a little nausea and my boobs feel really full, but not so much hurting...    I don't wanna take another test because I can't bear the thought of another negative, but am having a very hard time waiting!!  I did get a negative three days ago at 12DPO...