By Emily Zanotti, National Catholic Register - The (birth control) pill is known to have a number of side effects. The Mayo Clinic acknowledges that women may suffer everything from minor headaches, stomach pain, and breakthrough bleeding, to heart attacks and strokes, deep vein thrombosis, and liver disorders. It also lists several of the most common influencer complaints as potentially concerning developments in need of immediate medical attention: headaches, belly pain, dizziness, nausea and depression.