a week is still way too little time for your parents to accept and come around. try to put yourself into their perspective: whatever you're going through now, they're taking it as a personal failure as a parent (no matter if they don't admit that to you or to yourself), they're considering your situation as their fault and reacting the way they are out of it. all their ideas and dreams of your better future are gone now, and no matter what they had in mind for you (right or wrong or whatever it may be), is gone now and it takes a while to accept that loss.
i know it is hard and tough to be alone, especially since your OH is being unsupportive as well (and here it also takes a while to click in), but you need to give them some more time. have you tried talking to a councilor in your school, or go to the planned parenthood or some of those support centers to see what help you could get from them? maybe one of them could help you mediate with your parents?