Hello, im just looking for some support/advice i guess.

I had a pain in my right breast about 4 weeks ago so had a feel and noticed a lump and a thickening. My period was due within the week so i thought it must be due to that. After my period it was still there but as life is busy (mum of 5) i forgot about it until about another week later when i checked again and was sure there was definitely a different area on my breast. I saw the gp who said she could feel it and would refer me to the breast clinic and the appointment would be within 2 weeks. 2 days later i got the appointment for another 2 weeks time (so 16 days from the gp referral). Whilst on the app viewing my appointment i saw the referral letter and it said suspected breast cancer due to my age (43) and a new lump. I panicked at that a little but thought that must be what they write for the 2 week appointments. Anyway several days have passed and last night i noticed quite a large swelling in my armpit on the same side. Its definitely different to the other armpit and is visible aswel as feel-able. This had made me panic even more and im just wanting to talk to anybody who understands the worry and can make me feel better in any way so i dont spend the next 11 days worrying excessively. Should i make the gp aware of the new symptom with the armpit swelling or just wait for the breast clinic appointment?

Thanks in advance for any replies x