Dreaded wait again

Had Vulva cancer 3 years and 1 month ago and been all clear since. Then 25th April I felt a lump in my armpit when rubbing my shoulder and arm (bysip) side. My GP gave me 7 days antibiotics just too make sure it wasn't an infection but it didn't go away. Thankfully she agreed too see me on the 1st May and within 5mins of examination stated she was fast tracking me for tests/biopsies and I'd be seen wirhin 2 weeks due too my recent C and that the lump was the size of a malteser. 3 weeks on still mo appointment or anything. I'm worrying more and more as I'm sure it feels bigger. Trying too be positive but so scared it's back as feels like de ja vue as 3 years ago I was treated with antibiotics for 18mths before beginning diagnosed