I ended my pill last month ending with a period, and I have been bleeding on and off all month. What's wrong?

Hormonal. fluctuations can cause this until body adjust the hormones to the original conditions. That is to the time before using the bcp.
Need eval. If you are saying you went off the pill last month and continue to have of and on bleeding, body may be getting used to being off the pill. Can take several months to regulate, but too much bleeding can make you anemic. Best to see your gyn provider for evaluation and discussion. Hope this was helpful. Best of luck. Dr R.