So a little over a month ago I had a breakdown over convincing myself I had a terrible neurological disease after experiencing twitching and other symptoms. Fast forward to recently and now I have a feeling of tightness behind my knee and my right calf almost like it’s making my leg have a jelly feeling or instability or stiffness. Can anxiety symptoms just linger and linger. I was calmed down but now I can’t stop thinking about neurological problems again. My neck has felt this way like I can’t hold my head up cause my neck muscles are stiff or tired. I’ve had it in my right forearm too like the muscles wear tight or twisted. I keep looking at my muscles around my knees and leg and it looks like there are dents or weird looking things like my knee is bent in or buckled and stuff. Sorry for the long explanation but could this be anxiety, can it linger even when I thought I was calm? Could it last weeks and weeks or months?