Hi OP! I just want to say that I too faced extreme anxiety and very poor mental health - had some bad times, and did some bad things, and sometimes look back on my previous life with absolute disbelief that the person I am today is the person I was before. Building a relationship with God is the greatest thing that I've ever done, and I see now that some of the lowest points of my life helped guide me towards Him, so today I find myself grateful for everything I went through because without my journey I never would have the relationship with God that I do today.
Turn to God in this time of stress and anxiety. Whatever it is, give it to God. Before you go to sleep, and when you wake up, pray and ask God to get you thorough this. Tell Him you're giving Him all your problems and everything you can't deal with by yourself. Tell Him you give up control, that you trust Him to help you. And He will. You're not supposed to do this by yourself, we were never meant to try to cope with life without God. This is exactly the time that you're supposed to turn to Him and He won't let you down.
In the mean time, have you considered exploring your faith a little more? There's an absolutely gorgeous TV series called The Chosen that I'd recommend for anyone wanting to get to know Jesus - it's based on His life but it shows His disciples in such a real, relatable way. I love this show because it reminds me that Jesus deliberately chose the broken people, the people that were going through really hard times or who didn't quite fit in or who had been through a lot. Of course it's all bible stories you probably know well if you grew up a Christian, but this show is made in a way that is really easy to watch and enjoyable so if your head isn't in the right place to sit down and read, it can be a really nice, relaxing way to reopen your mind to God and the reality who He is.
If you want to look to the bible for guidance but aren't sure where to start you can try the Bible in One Year app, which you can read or listen to for just ten minutes each day and will let you get through the whole bible in a year, as the name suggests! Or you can also download YouVersion, which is a bible app, and every day posts a 'verse of the day' if you're not in a place where you feel you can read the bible, you can just read and take comfort from these verses. I'm not sure what you're going through but I know that when I'm going through extreme anxiety my head isn't really in a place to sit down and concentrate on anything at all, let alone reading the bible which can take some concentration at the best of times!
You can also check out whether any churches near you are running an Alpha course. I have done it - twice actually, because I just loved being in an environment where people who are going through different things, from different backgrounds, with different beliefs, are all trying to figure out about God and His place in their lives and whether they're ready to accept Him or not. I found it really helpful, comforting and healing too to talk through my thoughts and feelings and opinions in a place without judgement and without a right or wrong answer. It really helped me. You can check online if they're running any, just Google it.
It's when we are at our weakest and more broken that God is the closest to us. Draw close to Him and He will draw close to you too. I'll pray for you 😊And please feel free to message me if you'd like to! I wish you all the best xxx