Sorry to hear you're feeling really low. It's so hard when others can't understand us or how we feel. I guess most of us on here have felt low for that reason too.
Do come on here when you feel like that. You know we all understand, not only the physical symptoms which don't go away, but also the emotional battles with it all. If you want to 'let the frustration out', then please do post - we care and can offer support.
If you can't find a support group in your area, you could always phone the MS Helpline. I did that once, and they were lovely to talk to. They're also able to look up to see if there's a support group where you live - they have a list of all of them.
Do hope you get the help you need. Let us know how you get on. Take care.