Highest sugar uve seen yet yikes 275

I've been stressed lately and sick I tried keto but I got keto flu so I'm trying to come out of keto. I'm not drinking enough water and what I do drink I pee out. Had a protein shake cuz I'm not eating enough solid food and had pretzels and oh wow it's thr highest I ever seen it. I feel very sleepy right now. Is this go to the hospital high or is that if it stays high and don't drop cuz I ate them about a hour ago.