i started my period like 2 or 3 days ago, but when i first started i only bled for like an hour or so, then stopped the rest of the day and the next day, then i started spotting the day after i stopped bleeding for a day and a half, then a weird spot of a weird color brown was on my panties, but i usually bleed 4 to 5 days. but only really bled for not even a whole day what could that mean?