Period

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I started my period yesterday and it’s lighter than normal. It’s red but it’s not as heavy as it usually is. I have had little to no cramps, little to no clots (I usually have a ton of those and big ones). I haven’t filled up any pads or tampons. It’s just not normal for me. I was 5 days late and usually when I start my period day 1, 2 and 3 are the heaviest, but not this time. Has anyone had this happen and been pregnant? I really don’t know never had this happen before. What do you guys think?