is smoking weed something to get mad over?

my boyfriend (33m) and i (31f) have been together a year. over the summer i found out he had been using coke despite telling me he got sober before we started dating (the previous november). he started using right when we started dating which was shortly after he had gotten out of rehab and he kept it from me until he couldn’t - was cancelling on me/avoiding me/overall not caring about me and i found out because his family and i started comparing lies he was telling us. well, i almost left, and decided to stay because he promised he would be sober and would fix our relationship. he has been addicted to substances - most prominently coke, weed, and alcohol on and off since high school. i wanted to give him a chance and i didn’t want to abandon him when he needed help so i stayed. things have been going great since then and he’s been sober from everything and our relationship has been better than ever. however, a couple weeks ago he told me he wanted to drink again and that he could handle it. he got extremely drunk and said horrible things to me (said he doesn’t like me, wants to break up, etc.) all because i asked him to stop drinking because he was drunk. i was very upset and he apologized and said he wouldn’t drink around me again. i believed him because since he got sober, he started working out a lot and has a strict diet and drinking isn’t good for his strict diet. i know he had a couple beers without me later that week when we weren’t together. a few days ago though, i could feel that he was using. idk how to explain it i could just feel it in my heart. he was acting slightly different, not talking to me as much, and it reminded me of when he was using. he also cancelled on me which is what he used to do when he was using coke. i asked him three times and on the third time he finally admitted he smoked weed but nothing else. i will also say since he got sober over the summer a part of our agreement to fix things was that i’d randomly drug test him and i have been but i haven’t been able to since he told me this. i’m mad. i told him i couldn’t be with him unless he was sober - especially from any drugs - and now he’s not. coke was the main problem for us as i really don’t want him using hard drugs but i can’t even ask him to take a drug test because he’s on a work trip right now and it’d probably be out of his system by the time he got back if he did use coke at all. am i “overreacting” over weed? i know it’s not as bad as coke. but i’m angry he used anything