Thinking to deeply

Hi everyone, I'm not sure if this is where I should be making this post but oh well, here is my story. Over a year ago my girlfriend broke up with me which gave me extreme depression because of this I decided to try smoking weed for the first time, I had a great time. The next day I didn't feel 'right' but just thought it was an after effect. The feeling stayed with me for about 5 months as I continued to smoke weed every week. Also if I did not smoke weed before I went to bed I would always be frightened to sleep, I could not get into my bed without music on. Around this time I came to the conclusion I had depersonalization, I had all the symptoms ect. Eventually over time the depersonalization started to disappear every now and then as i started to become more active and did things to get my mind off of it. The being frighten of going to sleep started to go away over time but I still feel as if something Is different from the first time I smoked weed, I stopped smoking a month ago because I was convinced it was because of the weed. I feel as if I'm over thinking or thinking to deeply. Its extremely hard to explain, It had died down a lot since Ive been off weed for 33 days but its still there. The best example of what its like is, If you think about your breathing and you over thinking it doesn't do it automatically, well its kind of like that but when ever i think about something I start thinking about why I'm thinking about it and I start like trying to manually think. Sorry but I really don't know any other way to explain it.