Drink a big glass of cold water, but if it makes you feel better go into the hospital that is what they are there for dear:)
Good Luck!
It could be Braxton hicks but Better safe than sorry if you ask me.
Yes. Call your doctor or go to the emergency room asap. Could be something like preeclampsia or worse.
Sounds like braxton hicks with the hot flash and tightening. You may be having contractions...try to time it if it keeps happening and drink water