Due to the pandemic lockdown going down all over the world, a lot of ISPs are throttling overall up/down speeds across their networks. This is because everyone is at home social distancing right now and the best way to communicate is by internet, so there is a strain on the infrastructure. Be patient. If & when we survive this medical crisis, and most people return to work, the overall internet speeds will return to normal.
Minor edit: I have experienced the same problem. You're not alone.