What could it mean

‼️‼️‼️‼️‼️TMI ‼️‼️‼️‼️‼️ I’ve been having sex on and off with my hubby all week since last Sunday . The last time I had sex was last night . We had sex 3 days on the days I was ovulating. From the app I’m supposed to start my period in 9days . I’ve been cramping in my lower stomach and when I wipe I have brownish pinkish discharge . Do any of you mommys know why .? Or is it my body getting ready for my period to come on .?