Facial rash and swelling

Hello all, I'm reaching out to see if anyone else has had the same issues at me - at loss and don't where else to turn. I have been suffering from ?contact dermatitis for 3mnths. It randomly started and I have no idea what has triggered it. Affecting the face and neck area - eye and lip swelling (it looks like Im going into anaphylaxis minus any red flag symptoms), constant burning and itchy is common. I have tried every possible thing to prevent flare ups includ. seeing a dermatologist who suspects I am allergic to something unusual. I am planning to get patch testing soon. History of dry sensitive skin but nothing unmanageable. I had a similar case to this after suffering from covid over a year ago - it cleared up eventually. What I would like to know is if anyone else has had these unexplained rashes since having/triggered by covid? I am so desperate to get this figured out, any response would be helpful. Thank you