Your feelings sound pretty normal to me. It sucks, eh?
Feeling like that makes sense when your world has turned upside down.
It does help to talk. Got some good friends who have been through this? Friend's parents you trust? You sound as though you may be at school still? Is there a school counsellor you can see, or who can advise you about someone to talk to?
Thing is, it's likely to be a bit nutso for a while, although it gets better gradually.
Are your parents together enough to talk to you about the basics, like where you will be living, how you get to spend time with both parents, all that stuff?
That your mother appears to be planning to get married so soon is a bummer. You need a bit of time! Still, stuff happens.
Is your dad better to talk to, or is he overwhelmed with his own stuff?
Feeling weird is normal, so don't be surprised by it.
Here are some sites...not sure how good they are, but a start, eh?
http://www.itsnotyourfault.org/
http://kidshealth.org/PageManager.jsp?article_set=34874&cat_id=20316&dn=studenthealthzone&lic=180
http://www.spunout.ie/health/True-life-stories/Dealing-with-divorce:-part-2
http://www.thesite.org/sexandrelationships/familyandfriends/family/dealingwithdivorce
Take care.