Hi Mortif.
Great advice above (thanks for sharing Andy!)...so I will encourage you to see the Resources and
Moodgym as Hibee suggested...as well as the encouraging ideas from Andy!
Relaxation/stress relieving exercises like the ones he referenced can be found in the same Resource thread here:
https://www.healingwell.com/community/default.aspx?f=9&m=104206
Also, here is a link I pulled from there as well for you. It is great for working through troubling thoughts like the ones you mentioned in your post.
Self Help Printable Work Book for OCD and Intrusive Thoughts
http://www.moodjuice.scot.nhs.uk/obsessioncompulsion.asp
Have hope! With some work, patience with yourself and the process...healing will happen!
Keep posting...we are cheering you on!
S.C.