I just don’t feel like myself, I always experience this every couple of months and I just don’t understand why. It’s a very odd feeling and it’s difficult to explain by I’ll try. 

It’s just like I don’t know who I am, like I just exist in some shell and everything around me just doesn’t feel right. I get anxious for no reason at all, I’ll be lying down and all of sudden just feel anxious and my heart is racing. My head hurts just thinking about it, I had the most distressing dream the other day and experiencing intrusive thoughts. I’m scared that I’m going mental. 

Any advice as to what I may be feeling and how I can deal with it?