Shorter period than normal

Adele • 27. TTC baby #1 for 11 months, born July 2015. TTC baby #2 since march 2016 BFP Aug 2017 MC at 5 weeks BFP Oct 2017 🌈 Rainbow baby due July 2018🌈
Has anyone's periods changed after having a hysteroscopy and d&c?? I normally have a 7 day period but this month it only lasted just over 4 days. It was like normal the first 2 days but then the second 2 were extremely light. This is very very unusual for me! I have always had a 7 day period or if not more!!!