I haven’t, no, but it’s not unheard of. Your sex drive a complex thing and needs quite hands on management in my opinion. Once you get to the period of a few weeks or more you definitely start to experience more obvious cycles of horniness, frustration and sometimes lack of libido. But if you’re actively dong denial, edging a few times a day, as opposed to chastity, which is no touching, then usually that will keep your sexual desires high, if not insanely high.
I’d suggest, if you want to keep going, and you are edging, then try it for another week and see if things change. Otherwise, break your denial, enjoy a week or so of orgasms to ‘reset’ yourself, and try again!