Red Spotting

N

Has anyone had spotting that is quite red and ended up pregnant? Everything i look up says spotting is usually pink or brown. I feel like I could be spotting because it isn't a lot and usually when my period starts it gets heavy FAST so I feel like it should be heavier by now. My period is due now-ish I think but period cycle has become shorter since I got vaccinated so I cant tell for sure!