What Causes Fluctuations In BP Level While Being Diagnosed With Angina?

Recently my hubby s was hospitalized with chest pain . He had a reaction to the nuclear stress test and a cardiac cath had to be done due heart rate 150 and shortness of breath . Cath came back no blockages. He was diagnosed with angina and artery spasms. They changed his medication and removed a beta blocker. He been home since Saturday and has had high and low Bp reading and heart rate of ranging from 90 to 100 and 105 . His cardiologist scon vacation and told to go pcp but pcp didn t even want to see him referred back to carifpdiologist . Should I be worried,. He says feels weird