I agree with everyone, it’s about hydration question. Try to drink more water before!
Something similar happened to me: usually in the morning I drink a cup of coffee. And one day I started to feel that it’s not sweety and soft anymore! It’s bitter! I knew that something is wrong with my coffee machine, but I found many excuses not to fix this situation. For instance, I didn’t have enough time or money to call the repairman or to buy a new one.
Then occasionally I saw this article with the comparison of
coffee machines and they were not expensive!
I thought it’s time and bought a new one.
Now I drink tasty coffee again
So, don’t waste your time as I did, start drinking more water and, fingers crossed, everything is gonna be okay!