OK so here's what's going on.. I'm 16.. I'm on marvelon birth control and I'm not taking it for this month because I missed taking so many.. but I got my period 5 days ago.. and now I have it again.. but its very heavy bleeding.. and I don't no where it came from because I don't think it's the end of my period cause there's almost a week in between.. I have a lot of tight cramps.. and very gasy and yeah.. but my boyfriend was saying maybe it was a mi8scarriage but I'm not sure if that could be it but it got me thinking.. anyway.. if you have any ideas please help.. :)