IUD next week

I had sex twice with a condom no breaks or leaks last week. The first time was when I lost my virginity and I talked to my doctor and she gave me condoms etc for the future and help me set up an appointment to get the birth control IUD soon next week Today I started my period on the 4th like I usually do so this is good? And will the IUD mess with my period? Does it mess with yours?