All my teeth have cavities and I am ashamed to smile. Please help.

Hi doctor,

I have big issues with getting cavities. I take good care of my teeth, never had any soda in almost four years. I keep getting cavities in the bottom of my front and back teeth. Almost all my teeth have cavities. I really want to get them fixed but I have always been embarrassed to go to a dentist. I think it is time I get them fixed before they get worse. I really need help on what I could do to fix them. Some information on my teeth: I recently got two crowns on my two front teeth, my teeth are very small and got gaps. Surprisingly, I do not get any pain. I have been ashamed of my teeth my whole life and it has got to the point where I try my best not to smile or talk and cover my teeth. It has brought my self-esteem and confidence very low. I really need help. Please provide me information on what I should do. I will appreciate any help. Thanks for your time.