The Back Of My Knee & Left Calf Have Been

The back of my knee & left calf have been hurting now for several days with an increased intensity while standing or sitting. My pulse and heart hate have increased and I feel dizzy, weak, & my breathing is very labored. My menstrual cycles are (in my opinion) very strong (about 100+ super plus tampons being saturated with clots half size of my palm). What will help me???
Sorry to waste your time......Now appears to be a $$ Scam.