Sun poisoning

I went to the beach two days ago and now I have sun poisoning so bad I can barely walk. It has turned into muscle/ joint pain, headaches, nausea, chills. I’m drinking a ton of water and taking Tylenol but Is there anything else I should be doing? It’s hard because I’m 18 weeks pregnant so I can’t take much more than Tylenol and even then I’m trying to limit it.