What are the side affects of taking the pill and does it really help with period pain?

Helps period pain. The pill (ocp) is commonly used to eliminate or reduce menstrual cramps and is one of the most effective treatments for this condition. 60% women have no side effects. Side effects can be nausea, irregular spotting, or slight weight gain. But also more regular periods w less bleeding & less acne. Smokers over age 35 should not use ocp due to increased risks.
Yes. The birth control pill does help period pains and because it also makes your periods predictable you can augment it with something like Ibuprofen there are side effects but taking the pill is about 10x safer than being pregnant, just to put it in perspective.