Perfectionism in Meditation
The perfectionism is required to attain Jhana.

The anxiety/worry can be ceased by the memory and understanding in the 1st, 2nd, 3rd, 4th, 9th, and 14th(15th,16th,17th) of the path of purification. In short, the professor of Jhana at Pa-Auk can advise you. 

People often worry about what they don't proficiently know the way to manage. It's called Vicikiccha and Uddhacca hindrances.