i dont feel like myself anymore

Back in August, I moved to a new district for highschool. I didn't know anybody at first but I made friends fast. I put myself out there, joined new clubs, did track for the first time, met new people, got great grades, but for the past 8 months, I haven't felt like myself. I feel like my heart is constantly racing and my brain is always thinking of the worst outcome possible. I feel like everyone is moving forward without me. I feel like time is running away from me, like I have no time to relax or do anything I used to enjoy. I have so many friends and accomplices, but yet I feel as if no one understands me. I feel like I cant talk to a single person I know about my feelings. I feel like im putting on a mask every day and my life is slowly getting worse. Although I felt proud of myself this year (I got a 4.4 GPA and multiple academic awards this year), I feel like I am not doing enough or that my acheivements are meaningless, which is crazy to say because 14 year old me 8 months ago would be so proud of me but I still don't feel like myself.


can someone help me?