I missed my court date and will get a bench warrant and do 90 days, is there a way I can avoid this?

I got a theft charge and since then, I have gotten a shoplifting charge. I missed court for review of deferred sentence. I was facing 90 days in jail, maybe probation and maybe fines for theft. The district attorney made a deal to $500 dollars of fines and a year of deferred sentence. Well since then I got a shoplifting charge at a different court house and the district attorney gave me a deferred sentence and like $300 in fines and 8 hours of community service. I paid everything off and just had court for review of deferred sentence for both. And if I stayed good, charges will be dismissed on both. Well I spaced my court date and missed it cause I have stressful life and I'm disabled with ADHD, bipolar, and autism. My court date was in November and it is January. Well they told me I'm gonna get a bench warrant and do 90 days. I'm trying to do good and not get in trouble. Is there a way I could avoid this 90 days? I'm poor and don't have money for a lawyer, just public defender. What are my best options? Should I go to court house and turn myself in? I don't want to disappoint my family. I'm 20 years old and just want to do good and live happy for the rest of life.