Welcome Dave.
Yes, definitely use this as a blog and rant all you want about what you are going through. This site is full of people here who will respond and share insight, advice and support. We've gone through a lot of the same stress, anxiety, etc. that comes along with quitting smoking and we want to support you in your quitting journey.
It may not feel like it right now but you are doing a great thing by quitting smoking. Read up on nicotine addiction in the "Quit Smoking Discussions" section of this site. The more you understand about the addiction, the better prepared you will be in quitting for good.
Also, continue to post and rant all you want. This does help both you as well as other newer quitters who may be experiencing what you are going through.
You are doing a great thing in quitting smoking. It is also good to have you here on this site. Welcome aboard.