Swollen lips after sucking dick?

I gave my boyfriend a bj earlier today (pretty standard, we didn't use lube or try a new technique and he didn't take too long or short to cum) but afterwards I noticed my lips felt a bit tingly and swollen? It went away after five minutes and there are no sores or anything but it's never happened before and I don't know what it could be. I was also out of town for two weeks so maybe I just needed to adjust? Any input would be appreciated thanks babes! 😚