40 years, pain in the lower abdomen and in the left groin & pain at the bottom of the left leg &foot. Irregular menses, a bit dizziness, gases. What is?

Nonspecific. These symptoms do not point to a single diagnosis. They may even be unrelated to one another. It is way to complex for a short answer in this forum. Best to see your primary care provider, or general practitioner for a more complete evaluation. Hope this helps!