I apologise in advancs for rambling, my anxiety is going crazy 

2 days ago, I was rubbing an itch behind my ear and felt a very hard, immovable and painless lump. It feels like a round pellet or small marble under the skin, it doesn't stick out, I can't see it on camera. But it's obvious to feel, had my partner and mum check and they felt it immediately. I'm freaking out, immovable, rock hard, painless... everything you're told you don't want a lump to be.

A little back story, over Xmas 2023 into the new year I had the flu, then a month later around February 13th, I tested positive for covid. I've never had covid before, it was a bizarre feeling. I erupted in dry itchy skin all over my lower face, weepy patches on scalp, left ear and neck as well as hive welts on the neck. I was so itchy in these areas I was practically clawing at my skin, going insane with it. I had eczema as a child badly, but nowadays I'll get a tiny itchy patch once a year, takes like 9 months to heal but a small patch, once on the eyelid, once on my palm etc.

Well after a few weeks, everything is starting to dry up and heal, the sick symptoms I had from covid went within the first week. Now I just have a couple crusty but dry patches on my scalp, some dryness around eyes, a mild itch on my neck but no dryness. And a couple small patches that are healing well in my left ear. So everything is getting better slowly. Which brings us to now, 2 days ago finding this like round hard immovable pellet behind my left ear on the bone. It's the same ear that had the eczema. I've never felt a lymph node like this, normally they're tender, but this is completely painless, and just so rock solid and like attached to the bone, it doesn't move at all, like someone slipped a pellet under the skin and glued it to the bone.

I'm so freaked out I called the drs today to get access to the econsult so I can book an appointment. I'm terrified to go.

When I wake in the mornings it seems smaller, but I of course am continuingly prodding it and don't know if I'm irritating it and makes it worse? I have such terrible health anxiety, I got misdiagnosed for 2 years with an ovarian cyst and gaslit a lot with it. My health anxiety is spiralling at the moment, google of course is telling me I'm dying. I've read about shotty lymph nodes? I have no idea how to see how big it is, feels maybe a tiny bit bigger than a pea. Is it a lymph node swelling in reaction to all the illnesses in the past 3 months, or to the skin issues? Should I definitely be heading to the dr if its only been a few days? I don't think it was there long before I noticed it, maybe a day or two. Since I noticed it, it hasn't increased in size as far as I'm aware. Should I be doing anything to keep an eye on size? Apologies if it seems I'm over reacting. I have had hard lumps before, but always movable and sore to some degree (ingrown hairs etc) I've never had a painless solid and completely immovable lump like this.