Advice please

Okay I have always had regular periods never once was it any different far as flow or how it start or nothing . Every month for the past 17 years it’s been the same . But any way I had started my period or ima say my period the 13th it was spotting an had some cramps . The 14th an 15th I had some bleeding nothing like normal thou on the 15th it started to like go away which isn’t normal either an the 16th nothing hardly only when I wiped . 17th pinkish/brown spotting for like 30 minutes an then it was gone . My best friend told me to test but I wanna know if anybody else experienced this an was they pregnant. I need advice before I mention it to my husband