Tomato plant dropping flowers

I have a cherry tomato plant in the garden that is dropping a lot of its flowers and not producing as many tomatoes. After some reading, I see that this could be caused by too much nitrogen in the soil or too many flowers on the tomato plant. I'll need to test the soil to see if it's the nitrogen, but the plant is covered in flowers so I think it may be an abundance of flowers. The tomato plant has produced several nice tomatoes, but it's just difficult to see so many nice looking flowers fall off.