Period/spotting

Hello ladies! I have a question and maybe some of you have been through it. I started spotting about two weeks ago on a Monday. Let me mention I completely missed one of my birth control pills by a whole day (I’m guessing that’s why I started spotting.) Anyways I kept spotting for and a week after that my period started on a Tuesday. My period only lasted maybe 3-4 days when I usually have it for at least 6-7 days. It this normal when you miss a pill?! I don’t usually miss my pills and I track my period and have never had irregular periods..

Thank you