If I stop taking Zoloft (sertraline) cold turkey will I experience symtoms? I've stopped for almost a month ans can't sleep and have bad anxiety

Withdrawal symptoms! Yes, you should not stop cold turkey. Those symptoms that you are experiencing are withdrawal symptoms of the medication. I would recommend to get re-started on it (after consulting your prescriber) until the symptoms disappear then taper off slowly.
Zoloft (sertraline) Yes, and also u risk recurrence of original symptoms the zoloft (sertraline) was treating in the first place. Please discuss with your prescribing doc. Ways to gradually taper the zoloft (sertraline) if discontinuation is recommended.