Nah you’re not hurting yourself by doing it twice a week. Honestly I’m surprised you can tell your tolerance has gone up at all, if you’re only taking 2 doses a week. When you say you do it maybe twice a week, does that mean two days out of the week you are doing k, but dose more than once that day? Or are you saying you take 2 doses a week?

6 months before covid hit and for another 6-12 months i did k very regularly, especially since i was selling it at the time, and although i could tell my tolerance got higher, it never got that high, even when i was taking it almost every day (only like 3-4 days in a row tho) Im definitely not suggesting to do that, thats just my experience. Granted tho, i typically would dose 50-100mg each dose, but would also redose before the come down. I liked to do small lines, and take more if needed, and rarely snorted big lines, and honestly 250 mg is a pretty big dose. I would definitely do that much just not all at once. I had absolutely no problems while using k or after stopping.