There is much wisdom in the above posts!
Welcome HolyDooly. Do trust that it will get better. I was a 36 year smoker and I too had a rough go around the two month mark. It was around that time that I truly adopted the just roll with it and whatever it takes mindset. By then I had no desire to smoke, but I had a massive desire to not feel or be so jagged. I did isolate and it helped, baths with epsom salt before bed helped with insomnia, bananas for some reason were like crack and made me feel better (probably the sugar). Exercise is good in whatever form you enjoy, just push yourself to engage in it. Slowly slowly things come together. Also, something you'll read over and over is how, out of the blue, you'll notice something that used to be bothersome is just gone, vanished and you'll think 'when did that happen'. It's pretty great.
I do understand it can be frustrating HolyDolly, but I also hope it's validating to hear it's normal stuff. And most importantly, it's temporary. You are doing the most important thing here, right? Kicking an addiction isn't for sissies and you have put some hard days behind you. Keep going!!