I'm 16 and diagnosed with autism and OCD. I've struggled with a lot of anxiety since I was around 11 but recently it's gotten worse. I missed a whole week of school last week because I was so anxious about going in. The Friday before the week I missed I was very anxious in lessons and I was struggling to keep it together in class and there was no particular reason for my anxiety I can pinpoint, which has never been the case for me before (normally I'm only a little anxious at school and I'm only very anxious for things like presentations and changes to the routine). Now I am worried about people asking me why I was off, as well as people seeing me being visibly anxious in class (People have noticed and asked if I was okay before). I have close friends who know about my anxiety and are very understanding and I am a very high-achieving student who generally enjoys lessons.
I have a therapist and my parents and my school are incredibly helpful and supportive. They've offered me some things to help, but they scare me too. For example, I would be allowed to go to the SEN room if I'm feeling anxious or during lessons I am particularly worried about, but I'm scared to do that as well because I've never done it before and it's not part of my routine. I really struggle with changes and making decisions. I feel like I'm stuck - everything that would help me would be too scary to do at first, but I also can't go into school with the routines I'm currently doing. Any advice?