What Causes Severe Lower Abdominal Pain?

I started having pain on the lower right side of my stomach yesterday afternoon. I thought I had pulled a muscle by driving our truck and using the brake in heavy traffic. Also, I picked up and moved a heavy piece of furniture. The pain was worse by late that evening. I had sharp pain, for a few minutes and stopped. I pressed down on the area and it would hurt again. I am still having pain off and on and continue to hurt when I press down on the area. I had my left ovary removed twenty years ago, but I m not sure if my right ovary was removed. I had a colonoscopy test done a few months ago. I called the doctor today to set up an appointment. I am really worried. My doctor is booked for the next few weeks. I am thinking of going to emergency if it gets worse. What do you think?