Boob pain I’m scared🥺

I’m 18 and today I’ve had off and on boob pain on the left boob at the side of it. My periods not due for like 2 weeks so it cant be that. It’s like a burning ache not really sharp but a good ache and I’ve had it off and on all day!!! Idk what’s causing it it’s making me nervous what if it’s something bad like breast cancer or a heart attack idk. Does anyone else experience this??