Because you mentioned the symptoms beginning after you moved in, I am going to suggest another cause - also related to your very comfortable couch.

You are spending way too much time on that couch. Foam couches in general are not good for providing adequate support (unlike mattresses, they are not meant to be used for many hours) so you are probably suffering misalignment of bones, stress on muscles and ligaments, and nerve compression.

Your body is meant to move, and you should be getting up and moving every 30 minutes or hour. And not just to the kitchen for a beverage or snack - real movement, take a walk, do a chore, grab some free weights and do a few reps.

I'm not saying a bed shouldn't be comfortable, but when you sleep, you need a supportive surface. It is only in recently that we began sleeping on "ultraplush" "Aah, sink into me" mattresses. You probably grew up sleeping, like many of us, on a single bed with a minimally cushioned mattress that you could use as a trampoline. A foam couch is NOT that surface.

Finally, if you are a gamer, all of the above apply, plus hunching over a controller for hours adds the stress of small, repetitive movements and poor posture.

So, what small step can you take to get away from that couch?
Sue