Q : On the 7th of oct. I came on my regular period for 6 days, then on the 21st I took the plan b pill and came on 2 day latter for 5 days. Then I came on again on the 10th of Nov. for 6 days. During this time I have also had hot flashes, diarrhea and I've been extremely emotional. Plus my last period was different from what I'm use to I didn't have cramps and I was on light but when I use the restroom blood would just come out in chunks. I don't know I it was the pill or something else.

Yes it could be the morning after pill, had you read the warnings you would have seen some very dangerous possible side effects. ( also depends on how many were used previously)
Since these are not for long term use.

But yes they can be the pill, and yes they can be something else, without a doctors exam no one will know for sure