OMG! Help please.

ok so ladies I'm going crazy about 2month I had an oops so I got the plan b pill and I got my period last month almost 2 weeks early but it was a period lasted 7 days cramps the whole enchilada. This month I'm 4 days late.. plus I just found out that when I squeeze my nipps I got milk umm could I be pregnant I'm so scared to check especially cuz my little one just turned 6 months old...