Thought this was it

I really was sure this time. My boobs were so sore and sensitive, much different than during your period. I never had sore boobs a week and half before my period. I'm tired, have low backache. I'm supposed to get my period on Saturday and I couldn't wait any longer. Took a test and it was bfn.. I know I can take another one on Saturday if I miss but I just feel so defeated.