Different people have different reactons to different drugs. What works great for one may not work well at all for another. If you need a BP medication, there's no reason not to find one that works for your own, unique chemistry. That said, there is often a break-in period with new BP meds that can last a few weeks, during which mild side effects may surface and then fade.
Beta blockers are often used to soften the beat of the heart after OHS and lower the incidence of arrhythmias. It will also lower your blood pressure. If your blood pressure wasn't high to begin with, that may become a problem for you.
It's easy to check your blood pressure with the automatic cuffs available now (Omron is a good brand). It makes sense to have one on hand and use it to keep track.
Best wishes,