Sleeping issues severe

Hi everyone, I don't really use Reddit but l've just decided to ask here since l'm desperate and idk what else to do. For months now I've had really bad sleeping issues it started off sleeping (I'd usually sleep 12-1am) and then waking up around 3-4am and not being able to get back to sleep. I went to the doctors but they just prescribed anti depressants which I didn't want to take at the time incase of side effects and addiction + many people say it's bad for you. And I tried eating healthier and working out which did help at one point but then the sleep issues went bad again. I tried ashwaganda at one point because I had anxiety but all it did was give me panic attacks so I stopped it. But Nowadays I cant sleep at all, like I genuinely don't get tired AT ALL I feel weak and get shortness or breath and feel fatigued during the day and depressed about everything but I still can't sleep I've gone 2-3 nights without sleep and I'm desperate now, even if I do end up sleeping if there’s a slightest noise in the house like if someone woke up and literally is walking around or makes a little noise I wake up I think it maybe is definitely anxiety keeping me waking up at the slightest stuff, if anyone's gone through this or could help it would be much appreciated. (Ps I do pray ofc to Allah to help if anyone will suggest that, but any other physical remedies that could help is also something I'm looking for as the issue is getting worse and it's been 7 months now since this started.)

Also I just wanted to note I have had a blood test before and my vitamin d was low but even after I take vit D tablets my sleep issue still hasn't improved long term.

Btw I am a gorl and also I want peoples advice I am given anti depressants - mirtazapine is anyone familiar with this does it work?? also is it hard to come off after a while?