Feeling discouraged

I started speed in September and I moved up pretty quickly and confidently I never had nerves before a test maybe around 140 I did but now I’m in 180 and wow it is tough. I guess I’m hitting my plateau. I’ve failed every test for 2 weeks and I’m feeling discouraged and also unsure of how exactly to practice this to break this. I see people say practice higher some say lower, I’m not sure if it’s my speed or my accuracy. I really don’t know. my fingers are just all over the place right now and I’m soo hard on myself and have this voice in my head telling me I’m never going to make it, so honestly some advice and tips if anyone ever has gotten stuck at this point please feel free to share anything that helped u move forward ! I’m so emotionally a mess about this I know it sounds dramatic but if you know you know. Practicing for hours on end to continuously fail is such a bad feeling