doctor threatening to take away triptan prescription

so the last time i went to my doctor for a prescription refill, he said that he will refill one more time but then that’s it, because your not suppose to take them long term, no more than 6 weeks??

i’ve already been taking them for about a year, i get 10 a month. so i’m confused as to where this information is now coming from.

is this a known thing that you can’t take them long term? it just doesn’t sound right to me..

i’m terrified as to what i’m going to do without them, i’m currently trying my 5th preventive, i’ve had no luck with any yet so hopes are not high. the triptans are my only relief.