you can feel tired and take a rest thats not a bad thing. and you only know why you're feeling like this, was it because of something happened or just a sudden change of feeling. 

if you wanna rest, and do nothing, do that. don't blame yourself. it's not laziness or anything pointless of you're this much concerned about it. 

skip study and shower for a day it's not at all a bad thing. if you wanna stay in bed for a while day it's fine as well. but, remember it's shouldn't keep on going. if it does persist consider a therapy, or talk to someone you know and knows you. if you're not willing to it I won't say to force yourself but if it is your thing, make yourself do them. don't say out loud that you're gonna wash up but enter the washroom and simply start the shower or open the book in the table and stare at it. you don't even want to read but simply get familiarise with it. maybe you'll get tired staring and start reading it. Sometimes starting is the hardest part. Make yourself chose to start by making oppertunity for it 

i wanna say this you're okay to feel tired and everything will be fine. take care 🤗