Short story long, found a lump in my breast yesterday. Same spot as the mega clot I had last week, leading me to worry that that wasn't a clot. Anyway, first doctor sent me to my GP, who agreed there was something there and made a referral to a breast clinic. Went to the clinic today, had an ultrasound, and nothing there to be worried about.
Intense couple of days but breathing a sigh of relief right now.