3wks 3ds = 11 dpo got BFN last night from a first response

Took a 6 days sooner PT last night and got a BFN. I have all the signs (Nausea, sore breast, increased appetite, cramping around implantation time, fatigue and frequent urination) but starting to loose hope because of the test from last night. Is it still too early to test or should I go with that as my final answer???? All signs point to yes, but then I get a BFN. Just really frustrated and need either some advice or answers... has anyone in here ever experienced the same thing???