It depends on which brands of pills you take, and which pill (which day) you take.
Many of the pills are benign (probably sugar) pills simply to keep you in the routine of taking a pill every day.
The other pills are various combinations of hormones that will affect a woman's monthly cycle for the stimulation, release, and/or embedding in the womb of her eggs.
If you read on the box of pills or the blister pack you should be able to tell which pills are which.
I do not think that 4 pills will cause any great adverse effects even if they were the hormone pills, but this must NOT be done on a regular basis. Messing with your hormone levels can have dire long-term effects on your body. This is how transgender people affect the shape of their body!
Additionally, taking 4 pills of any medication is very risky behaviour especially if you do not understand how they work at a physiological level - some WILL kill you. Always take medication as it has been recommended by your doctor
If you are still worried or begin to feel ill you should attend the emergency department immediately