JessWare, I experienced about 6 months where my cycle went to around 20-21 days. Looking back, I now think it was that my estrogen dose was too low to sustain the cycle and the progesterone was causing the shed too soon after I started it. I increased my estrogen quite substantially and my cycles are now back to 28-30 days.
Anyway, what I did (which worked, before getting my estrogen up), is this:
- You need to get 12 days of progesterone 'in' before your bleed starts (for endometrial protection) if you want to sync things.
- That means counting back from (say) 21 days and starting progesterone then.
- For eg, if you are bleeding day 21, then you would start progesterone on day 9. This enables you to get in 12 doses of it before you bleed, so you can be sure you're getting enough and everything stays synced.
If you bleed earlier than expected, count that as day 1. Stop taking the progesterone and re-start using the above calculation. This worked excellently for me. Unfortunately it's far too complicated for doctors to get and even if they did get it, they would think it is far too complicated for patients. But it isn't really...