So weirdest thing happened! I never ever get a short period but I was on provera for 10 days and…

So weirdest thing happened! I never ever get a short period but I was on provera for 10 days and started bleeding on the last pill, weird cus that’s never happens before I usually bleed 3 days after the pill and my period only came for 4 days mind you my normal length is 7-10 days long so I’m so confused! I started clomid Monday and I’ll be done Friday but my period ended today! My Dr said to continue taking the clomid... I don’t think I’m doing another cycle If this time isn’t successful... has anyone experienced this?