I had the Shyla IUD for 8 months. Every month I've always had a period around the 14th that lasted a couple days even on birth control. I had it removed November 30th and had a period December 2nd-5th. I ovulated about a week later and did have intercourse. According to my app I should have started my period the 28th of December and it's saying I'm late. Is there a chance I'm pregnant since it has been a month since my last period or could it just be regulating back to the 14th of every month like it has always been. I'm sure I had my period earlier last month due to getting my birth control out but just confused.