Confusing Period

So I leave on a flight to Florida tomorow. It was planned perfectly so i could swim with no worries of the infamous Aunt Flow, but nope she decided that showing up 2 weeks early not but 1 week after she left, was a good idea. The thing is this period is really weird. Not only did it come 2 weeks early, but it is also black, looks like anchovy paste, and smells like a cinnamon roll. Also the day it came, I got severely sick. I had terrible nausea and i puked a lot followed by bloody noses. That part is over with though. Oh and no cramps at all. Does anybody know what this is? Should I be worried? Also any tips on swimming while on your period? I mean How in hell am I going to stop anchovy paste from coming out of my vagina?