Dear doctor what is the side effect of contraceptive pills?

See below: Nausea, Weight gain, Sore or swollen breasts, Small amounts of blood, or spotting, between periods, Lighter periods, and Mood changes. Serious side effects needing doctor’s attention right away include abdominal pain, chest pain, severe headaches, blurred vision, swelling or aching in the legs and thighs

Pill side effects: A common side effect of the pill is breakthrough bleeding or spotting due to changes in hormone levels. Other side effects which may be seen are headaches, nausea, breast soreness, decreased libido, moodiness, depression, and acne. You should consult your physician immediately if you experience any side effects on the pill.