Always tired, is this normal?

So I have struggled with anxiety and depression for years and years. I'm 25 years old and have been working hard to lose weight. Already down 50 pounds. I go to bed at a decent hour, between 9:30-11 depending on the night, and wake up around 7:30-9 (currently looking for work). I feel like no matter what I do, I always feel exhausted. It gets to the point where I am so bitchy and very irritable when it comes to dealing with my 4 year old. I work out for 30 mins during the week and eat fairly healthy. Also, I have super bad periods and they are always extremely heavy. I've had ultrasounds and blood work done and the doctor never says anything looks abnormal. I'm starting to think something could be wrong and my dr is just being lazy. Has anyone else experienced this? I'm so frustrated with feeling like this. All I wanna do is lay on the couch and sleep 😔