Symptoms since 5DPO am I crazy??

Nancy
I'm currently 8DPO Today and for the past 3 days I've had severe lower back pain on and off as well as cramping mostly on my right side, and odd headaches on and off. I don't want to get my hopes up but I almost never have lower back pain a week before AF is due. Anyone else recognize these symptoms?
My birthday is this Friday the 16th so I don't want to test until then, hoping I get the best birthday present ever this year!