If you know someone that would be willing to chill with you for a while that'd be a good idea.
If you seriously think your OD'ing, I could be wrong, but if you have any, wouldn't an antagonist (even a partial one like suboxone) reverse the OD? You said you hadn't used in a while, so you shouldn't have any WD's from it, idk?
update: doing a quick search, apparently suboxone can in fact reverse an opiate overdose.