So abt 2 weeks after the first day of AF I had this weird Discharge I've never seen this before it's milky and it lasted a couple days then when AF was suppose to come on all I got was brownish and some pink looking spotting it lasted abt 3 days and I had mild cramping ....AF comes lik clock work every month it's usually heavy the 2nd and 3rd and the 4th day it's light and goes off I'm on birth control by I missed a day or two and I don't take them at the same time jus at bed time.....could I be pregnant