Sex drive change

Christine • TTC first child. Fighting my battle with PCOS! I`m 30 years old and married. We`ve been trying for 6 years.
The last two weeks my sex drives has been through the roof. Normally I have sex one maybe two times a week and mainly that was to make my fiancé happy. Now in the last two weeks I'm wanting it everyday shoot even multiple times a day. I can't get enough. I use to have a high sec drive many years ago but in the last three maybe four years I have been completely happy with not having any. Why would it change?