Swollen lip comes and goes for 6 months

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I was on amoxicillin for a few months for a dental abscess. This was around 7 months ago. Since then, my lower lip on the right side has been swollen. My checks also swell sometimes on the inside. This has been going on and off for around 6 months. The lip swelling goes down but never really goes away completely. The cheek swelling is the same as it comes and goes but is always somewhat puffy and swollen still. No real pain, just annoying. I'd say pain is around a 2/10 and when everything swells alot, Maybe a 3/10. I've taken two oraquick hiv tests, both negative . No cold sores or herpes or anything. No fever, or rash, just frequent mouth swelling. Any ideas?