Kissa

How long have you been on the vicodin?
Withdrawals generally consist of fever, chills, hot flashes, diahreah, anxiousness, trembling, and I'm sure a host of other things.
It may be possible that it is related, but it could also be related to the stress you've now been put under by having your meds dissappear on you as well as the extra pain you might be feeling about now. What did the ER say.

I do agree, pain definately causes BP to raise. I have fairly low BP, usually in the 80 - 90/40 margin. When in pain my BP increases to about 125-130ish (top number). While this is a normal range it is not normal for me and definately indicates some serious pain.

It's a sad day when we can't trust our own family when it comes to our medications. I sure hope this doesn't happen again, it's not your fault of course. It's one of those things were you have to guard your meds with your life, litterally. When paying a visit to someone only take the exact amount you need in a small container you can carry with you or hide well and maybe one or two extra just in case. There's been many posts about this lately and family members stealing medications.
Also, if I were you and it's possible, I'd also purchase a safe or something very secure to keep all meds in you aren't using, and only keep a small amount out at a time.

Hope you feel better soon!