Thanks for the question.
No, none of this is normal.
Hormonal imbalance is the most common cause.
But you could have
fibroids or other uterine problem
Liver or kidney problems
And other hormonal imbalance such as thyroid disease can cause bleeding.
Yes you need a full OB exam, and lab testing in all likelihood.
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What you describe can be do to the pill.
But it can also because with the disruption from the pill, there are other underlying problems that were unmasked.
In addition, it can be coincindental, where a problem started with the pill and they are unrelated.
Seeing a doctor is the only way to have a 100% answer.
We do not replace a doctor visit here, for obvious reasons, as we can not examine you.
So, you might well be correct, and if so, the problem should be improving.
If it is not, there are most likely other problems.
In addition, if you have never had a pap smear, that is really overdue at this point, as is an exam if you have not had one, medically speaking.