Period/Pregnancy Related Question

Crystal

I started a day late and instead of a normal flow I had a light spotting of old (brown) blood, there was even less on the second day, and now there’s no blood flow at all. I usually have a moderate flow days 1-3, and continue lightly spotting (red, not brown) days 4-6. Could I be pregnant? I am on the pill but I’ve had a day or two here and there where I wasn’t consistent with taking it on time, or I accidentally missed it and had to take two the next day to be back on track.