Her period became irregular as a result of taking the pill; what should she do?

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Check below answers in case you are looking for other related questions:
Her period comes twice a month – should she stop praying and fasting each time?
Her period became longer because she had an IUD put in

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Related Answers:
She mistakenly thought that her period had finished; she did ghusl and had intercourse with her husband, then more blood came
She passed blood that was brown in colour and then in the form of a black thread
If a woman gives birth and does not bleed, or she bleeds a little then it stops before the end of forty days
Her period comes twice a month – should she stop praying and fasting each time?
Her period became longer because she had an IUD put in

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