relapsing

I got diagnosed with deep depression more than two years ago, ive been going to therapy for a year, though in summer i stopped as i was going to a school therapist, over the summer i made progress surprisingly, i stopped thinking about endng myself or hurting myself. I ofcourse was proud and happy cause thats the biggest progress ive made in 6 years. Thing is ever since i just started 11th grade, literally two days of school, my mental health started declining rapidly and honestly those thoughts are coming back, i've been crying from it a lot cause i got my hopes up on getting better. I might be relapsing. i dont know how to deal with this.