Talk to Gynecologist on Pain In Lower Abdomen During Egg Release

From last few months I have been noticing svere pain in lower abdomen for few hours like 5 to 10 during egg releasing period. In last month's I had few scans which gave me idea of pain and it's reason. But this month pain was vre svere even in left leg left lower abdomen and back side. So Q1: why there is so much pain ? Q2: in last month scan egg was on left ovary and in current month pain was in left ovary place so it gave me idea that egg is in left ovary so why always in left ovary??everything ok here?