OMG I have been where you are. There is always hope. You can get through this - please keep talking to us here. Is this something that has been building over time? Can you take a time out somewhere for yourself like taking a walk. I suffered with feeling nothing after my father died when I was young. As that feeling started to pass I felt angry at everything. Are you grieving or trying to grieve over the loss of someone or something?
I am so sorry you are feeling this way. Please hang in there and know you are not alone. I care because I've walked in your shoes and here I am I am still here and there are many sunny days ahead. Doesn't matter what time of day, please talk to us. I am confident many people have similar feelings and can support my words that you can get through this. Not over night, it will take time. Allow yourself to feel not right. It is okay not to feel 100% all the time.
Here is a gentle hug to you. Please keep talking to us.