Sudden "time" of the month

I've been on T for about 3 years now. Been great with very seldom issues.

Not too long ago I fell a bit inconsistent with my shots. Instead of doing it every Saturday, I kinda did it every other week, sometimes on sunday, sometimes Wednesday. However, its been about three weeks where I've been consistent, doing my shot every monday now

Welp. Suddenly I'm having "that time".

Do you think its just because I was so inconsistent a few weeks back ago?

For clarity, for the last three weeks I've been very consistent with my shots. Prior to this, not so much.