Should I Discard My Contact Lenses?

i bought monthly contact lenses, i have really high astigmatism so i had to have them custom madeee, they cost me like $300 for 6 months & even though i do use them often, I haven’t been using them exactly everyday for one reason or another. Well its been well over a month & i want to know if these contact lenses need to be discarded 30 days after you started wearing them no matter how many days you do not use them 0R discard them after 30 usess..