Supraclavicular lump on left side

Hello

I'm just texting for advice please. I noticed an oval lump in the dip above my left collar bone 9 weeks ago. It is a gland . I only noticed it because of discomfort so it could have been there longer. The GP has examined it and told me to monitor it weekly to see if its growing. I dont think its grown, its 1-2 cm long but I seem to be getting more discomfort in my neck, chest,  left breast area.

I phoned the GP again 3 weeks ago , she said that she doesn't think it's anything sinister but would take another look if I was worried but thought the issues around Covid 19 and going to a hospital was a risk in itself, she said. Because of this and feeling that I was making a mountain out of a mole hill, I said that I'd leave it.

I've kept a diary of symptoms and I am worrying. I'm just wondering if anyone has been through anything similar and if so, what do they advise. The GP makes me feel that I'm overreacting.

Thankyou for any advice.