Just waiting

so I went to my gp yesterday 

and today an appointment has dropped on my mat for the 1st of August.. 

my dr wants me checked for inflammatory breast cancer as I have a blister on one breast that is weeping she had a good feel and it’s “ lumpy “ compared to the other. She said it felt warm and has a rash... 

i have tried antibiotics and a cream from the drs too 

I’m just wondering if this is something to be concerned about....