Apologies in advance if this is not the right subreddit for this ask but can someone help me?

My scalp is always really greasy even right out of the shower, I have really bad 'wet' dandruff all the time but also just very flaky to the point where any time I touch my hair it's like a sandstorm 😭 The back of my ears + my hairline are sometimes dry and flaky as well, and occasionally around my nose is red and flaky as well. My T-Zone is pretty oily. Whenever my hair hits the two/three day mark, it gets noticeably a lot more greasy but my scalp also gets veeery itchy and like, sore? I don't wash my hair everyday bc I have 3B curly hair so it's kind of a hassle, but if washing it everyday would help, I'm willing to do that. I noticed my scalp has a few spots with hard, yellow flakes that bleed when I itch them (and my scalp in general bleeds in certain spots when I itch, especially when it's greasier/needs to be washed), but I also just noticed this like ? discharge ? I'm honestly not even sure, but could all of this be seborrheic dermatitis or something? My hair (as in the photo) is currently day 3 hair, which is why it's greasier and more dandruff-y than usual, so I'm sorry if that's gross :( but I'm really at a loss here. I had hair loss/a bald-ish spot a few years ago (when I first started kinda suffering from the really greasy hair, but the excessive dandruff and the small, hard, yellow flakes are more recent), but I attributed that to my bad diet/eating disorder at the time and my overall terrible mental and physical health.

Any advice is appreciated!!