I experienced stuff like that back in the day. OTC painkillers (codeine with acetominophen and caffeine) can definitely lead to an increase in blood pressure - particularly when you're talking about "way too much." Also chest pain.
My honest answer to the question of WWYD is: nothing in particular. I would generally try various combinations of drugs and alcohol and hope to feel better that way. Sometimes in that situation you can end up with a lot of trapped gas and not realize it, and kinda squeezing your knees into your chest and forcing yourself to burp as much as possible will help. Sometimes, not always.
Not saying any of this is smart but it is my honest answer. Followed that approach many times. I don't know what I would do today. Can't imagine myself being in the situation. My blood pressure is so consistently low and I don't take any drugs. But I would still resist going to the hospital unless I actually had parts falling off. That's just me.
The other advice you are getting here is better no doubt.
+1 If illegals do it all the time, no reason a legit American citizen should do like wise!
matty!