Good afternoon,

I was diagnosed with hodgkin lymphoma at 18 and received radiotherapy and chemotherapy. 
I am now 25 and have noticed a lump in my breast. I do eveything I can to avoid doctors, the last time I saw a GP was over a year ago and that was for a yearly thyroid check and I often feel quite dismissed by them. I contacted my GP and had a phone appointment and they asked about family history of BC and other symptoms (I do not have any others apart from mild weight loss but I have been stressed recently), there was no mention of my previous history but this would be visible on their records. Again, I felt quite dismissed on the phone and have been offered an appointment in 2 weeks as the GP only works certaian days and they said it is easier if it is with the same person who I spoke to on the phone.
I know it is likely nothing and I am constantly questioning myself whether it is even a lump or if it is normal. I am just feeling constant worry about it due to my previous medical history and feel like 2 weeks will drive me stir crazy! I probably am overthinking it all a little but just something doesn't feel right. 
Any advice?