Burning sensation in both boobs?

Robin🩵🩷 • ttc baby #3👶🏻

I’m three days before my period and have had negative test. I have some pregnancy symptoms but the worst is a burning sensation so intense in both of my boobs that I am shaking and it’s not light enough to ignore. They both feel heavy and are swollen. Has anyone felt this before? Could it just be PMS or could it be a sign of pregnancy?