Shorter Cycle after 2nd round of Clomid

Before starting Clomid 50mg CD 3-7, my cycles were 40 days long. After the first round my cycle was 36 days long. This time, after the second round, my cycle has gotten even shorter and AF came after 32 days in my cycle.

Has this happened to anyone else before? Where your cycles got shorter the more rounds of Clomid you have? My doctor said my cycles might get shorter, but I wasn't expecting this much of a change so quickly. And I'm just curious to see what others have been through.