Bleeding after one pill taken at the wrong time?

I'm on the Amethia Lo 3 month pill pack, this is my 2nd pack and I'm in the second month of using it, I was out to dinner and didn't get home until late so I took my pill 1.5 hours later than my usual time. The next morning I had bled quite a bit, and the bleeding hasn't stopped for 5 days now, I'm not supposed to have my next period for 7 weeks, is this a normal reaction for my body to have to me taking a pill late?