Curious. Need help!

I'm just curious how many ladies had a "period" but then spotted for about a week after on and off? I've never spotted after a period. Sure I have before but never after and I've read some things that spotting could be a sign of pregnancy? My last period wasn't heavy, lasted 4 days. My SO and I haven't been using protection.. so my question, have you ladies experienced this? I don't get hungry a lot throughout the day, but when I do get hungry it feels like I haven't ate in days and I eat soo much. Headaches too. So have any of you girls experienced this? And if so can you comment below what came of it? Etc. Thanks so much