What should i do about pain in penis shaft and lower left stomach? please help!

Here are some ...: Your well-described symptoms deserve a timely professional evaluation with analyzing detailed Hx stressing the quality, quantity, & sequence of events of the symptoms and their potentially related discomforts over time + physical exams + timely tests as needed so to deduce possible Dx and obtaining reasonable Rx / care /counseling for now and future. This is what you should do...; best wishes ...