Worried and anxious possible metastatic melanoma

I'm worried about a mole on my foot I first noticed it around 3 months ago and at first I dident think much of it. Skip to a few weeks ago I had the bright idea to go to doctor google and search it up skin cancer!! Great since then I've been in panic basically I have health anxiety and since then I've had a sore pain under my knee and since two days ago I've noticed a few lumps in my groin area and am convinced I now have it and it has spread. The lumps are hardish but I'm pretty sure they move when I push them I'm so worried and it's been hard to get a appointment at my gp I'm only 17 and I'm scaring myself! I'm going to try to get a appointment tomorrow and ring up early but I don't know if I will be able to. I hope I'm just bein anxious and it's nothing but I can't help think the worse!