I took a plan B like a week ago on a Sunday and i spotted a bit like legit one spot of bright red blood and that was it for that day. Then I think starting on Friday i began to spot again but it wasn’t the same as the first time this time it’s more blood but it’s darker sort of brownish blood it’s considered “old blood” from our previous cycle. And I only spot like once for the day and that’s it and its been happening for about 4 days now. Is this normal? And about when will this pass?