Hello, I Took The Generic Form Of The Plan 9/17-

hello, I took the generic form of the plan 9/17- 5 days later I started to spot then bleed the spot again (over the 4 days). this was 5 days before my cycle was suppose to come. during I guess my early cycle I felt fine a little cramping. soon as the cycle ended I started experiencing major bloating, on/off nausea (even after eating a snickers bar), mild cramping(plus stretchy feeling), really bad back pain. I even had a weird craving but thought it was just in my head. could I be pregnant ?