8 Weeks Postpartum with IUD - Size up?

Ka

Hi ladies, I just had my first baby 8 weeks ago. I had an IUD placed two weeks ago. Last time I had an IUD my period was little to absent. I am wondering if my small/pre-baby size cups will work since it is so light, or if I need to get the next size for them to sit properly. What has been your experience? <3 Also, sweet baby boy spam: