Lump in armpit

Su

Hello,

I’m a week away from my period and experiencing breast pain but also aching armpits (on the right side) there is a lump but it’s very fleshy and moves around. I have health anxiety so tend to go down a dark spiral about matters like this. Does anyone else experience aches like this before a period?

Ps: I will of course get it checked if it doesnt go.