Recently I've hit Specialist twice but I'm having a hard time maintaining it. I can't get consistent in contests. My recent performances say it all. (Global round was a troll by the way)

I'm currently practicing 1500's and I plan to solve atleast 100 of them because I don't feel much comfortable while solving 1500's. I also feel very pressurized when I see standings during contest or if I get anything but Accepted verdict on speeforces problems. Any tips on how to maintain consistency?