Your training log does not contain enough detail. Please update your post with *pertinent* information - don't be windy. What day are you doing DLs on. How often. What are your other lifts currently. What weight did 5's stall out at. How long have you been doing a single set of 3's.
Please note you're not going to get a form check out of this if A) you can't post a video without copyrighted stuff in in (even if it's a killer song) and we can't see the video (*which we can't*) and B) you're not a verified user.
You are correct that it was a mistake: and either way you go, there's going to be a payment for that. Either now in the form of a reset, or very soon when a single set of 3's stops driving progress. And we don't know when that will be. Not knowing any other info, I'd go with the known, and back off 15#, and re-establish with more volume, since that will drive progress longer.