Can someone age 56 get high blood pressure temporarily from eating hot sauce?

No. The blood pressure may have gone up if the hot sauce was really hot but hypertension is a diagnosis over time and is not diagnosed on an acute event. If there is a concern, see if you can take blood pressures over a few weeks with a bought or borrowed cuff and if consistently over 140 on the top number or 90 on the bottom number, see a pcp and get checked out!
Possibly. If hot sauce caused you discomfort, discomfort can cause your blood pressure to increase.