Hypothyroid medication question?

I am hypothyroid and recently got a blood test. I take 125 mcg of levothyroxine. My TSH level is 5.74. My doc upped my dosage to 137. She said that since i have to finish my present medication, i should continue taking the 125 mcg for 6 days in a week and on one day (the same day every week), i should take 1.5 pills. Is this OK? Doesnt the body need the same amount of medication everyday. Taking a lot one day and lower on the other days??? Will that help. This is only for maybe 20 days more but i was curious.