How can I cover bad skin? (Photo)

I was pretty lucky during puberty that the only spots I had were in my hair line or easily covered with concealer but I've had Chronic Fatigue Syndrome for the past 2 years or so and my skin has been a mess because of it. I'm 19 and at university so seeing people most days. How bad it is varies but it's probably the worst it's ever been right now.

I don't own any foundation because my skin was never that bad, I have some freckles which I like to show, I'm damn pale and it's just never appealed. My skin is just a complete mess at the moment though and I feel like I might need to get some? I'm literally piling on the concealer at the moment (elf, urban decay and rimmel) and having to mix them all cause I'm paler than usual and I can't get a match. Problem is I'm wearing so much that throughout the day I'm paranoid that it's starting to mess up and show but I'm waaaay too self conscious to just go without hiding my skin. One or two spots I don't mind but it's literally everywhere and I itch my skin in my sleep so a lot of the spots are now open wounds pretty much :/

I'm using a simple anti blemish moisturiser before putting on my makeup and I'm using tea tree oil on them overnight but I don't really know what I'm doing.

I'm not interested in going on birth control to try and help it because everyone I know who's on it gained weight and I can't risk that, I'm already trying to lose weight.

My diet is healthy and I drink plenty of water as a part of trying to recover from my chronic illness so I don't think I can stop it from happening.

I'm just looking for damage control methods basically. How do you hide shit skin? Any recommendations for affordable but good concealers or foundations that are available in pale shades? I'm an unhealthy grey-pale because of my illness so I don't know how easy it would be to match :/ I don't want to look a different colour because my appearance is the only thing that lets people believe me I'm ill. It also helps me gauge how well I'm doing on a particular day.

Help?