I can’t open my email at all, from the start menu or the dock.

I don't normally sign into my live account because I still receive my email regardless and I just leave it open, but the other day I just stopped getting any. I exited out to see if it would be better when I went back into it, but now it won't open at all. I have gotten no error messages or any other indication that something is actually wrong besides the fact that it just stopped working. How can I get back into my email and get it to start working again?