Hi alishia. I'm sorry you are struggling with this.

I do get this too, quite often actually. I've been thinking about why this happens for me and I have come to some ideas -
1: that I have so much in my head I'm trying to fight off that I get exhausted trying to contain everything. This is when I utilise my sessions with T.
2: when I have a lot going on at work, I know I need to stop this.
3: physical exhaustion- I have taken to working out a lot to exhaust my body so at night I can't stay awake.

I don't sleep during the day, but I do go to bed at a set time each night and sometimes even earlier (like 830). On days when I'm so tired I make sure I do something that's needed eg. House work, a walk or workout. And then I just rest, read a book, watch tv or movie etc. and I have to tell myself to not feel bad for this and that I need it.

Try and think about why you get tired, is it a body exhaustion, a mind exhaustion or emotional exhaustion. Do you have a T to talk to?
Take care :-)