Iv taken 125mg of beta blockers metroprolol taltrate todau and am anxious i will overdose if i rest?

What was your intent: Can you tell me what your intention was when you took 125 mg. of metoprolol? Is it a drug you've been prescribed? You're rather young to be on that drug to begin with. Was it a mistake that you took that amount or did you decide on that dose because you thought it would help you for some reason? I would contact a parent or sibling or friend to accompany you to a doctor to get a quick checkup.

Self medication: is never a good idea. Consider talking to the prescriber. Excessive beta blocking can cause symptomatic bradycardia.