Sketchy boyfriend?

This afternoon I notified a small hickey on my boyfriends chest that I don’t remember giving him. It looked fairly new. We had sex yesterday and I know I didn’t do it then. And 2 days before that we did too but I don’t remember doing it then. He assured me it was from me but I feel like I’d remember doing that?

I also noticed that the bikini picture of me on his Lock Screen that he’s had for months was suddenly changed to a black screen. He said he doesn’t know how that happened and asked me how to change it back.

He also started vaping heavily again a few days ago after having quit for about 6 months..

Am I being paranoid?