8 days late!!!

Ja
Hey! Hope everyone is well. 
Today My period is 8 days late, I took a test 2 days after my period was due, and again on Friday which would of been the 5th day and both were negative. My period is pretty regular Give or take a day or two so I am so confused! 
My boobs are more tender and sore to touch and look quite swollen. Also I feel more sensitive and even broke into tears yesterday for no apparent reason, I don't want to get my hopes up because of the two negative tests but sat around wondering what if is driving me insane! Could I actually be pregnant but maybe too early to tell???