I get lower stomach pain and upper back pain at the same time a lot, too. Usually with me it just means I either need togo to the bathroomor I'm about to start my period...since neither of those are it, you're probably having a panic attack. I know how hard it can be, but just try your best to calm down and get your mind off of it. If you sit and worry about it all day, that's just going to make things worse. Like johnlp said, if it were sv*, you definitely would have known it by now! You're probably fine. Tell us how you're feeling when you get on again.
*~Ashley~*
If you need someone to talk to, private message me! =)