Ok, So My Period Started On The 5th And Ended

Ok, so my period started on the 5th and ended on the 13th and me and my husband had sex on the 15th. At first we didn't use protection for like 10 seconds and then we used a condom. According to my calendar I ovulated on the 19th and we had sex 2 days ago protected. I'm spotting today and I'm freaking out. I was on birth control (nuvaring) before but it made me insanely depressed so I took it out a week before having sex, and my appointment for the IUD is Oct 3 when I'm supposed to get my period. Should I be worried??