Doctor I Taking Krimson 35 Dronis 30 Aldecton Registrone Alternatively

doctor i taking krimson 35 dronis 30 aldecton registrone alternatively for last 2 year. When i am on my medicine am having period regularly bt if my gyno skip medicine for a month expecting a normal period its not happening normally. What should i do..?
my thyroid level 4.1
having normal sugar
fsh ratio normal
weight ri8 now 72
hight 5'1"

your help will highly obliged
Thanking You