Does this dental experience seem sketchy to you?

About three years ago, I went to this dentist for a regular cleaning and exam. I am very good about taking care of my teeth and going to appointments every six months. I was at college so I went to a new dentist. I had never ever had a cavity and I’m always complimented by dentists, hygienists, and even my orthodontist for taking care of my teeth the way I do. Well at this appointment, they told me I had four cavities. Four! I was shocked and upset. I was really disappointed in myself as I thought I had done something wrong with my dental hygiene routine. I accepted it and went to get them filled a few days later.

At the appointment, I was really nervous. I kept flinching whenever they went to give me a novocaine shot which honestly isn’t like me. I have had 15 teeth pulled due to overcrowding and my baby teeth just not falling out and I’ve never been afraid of dental work. I just had a bad feeling about this for some reason. But the woman was very kind and gave me some time to relax so she could do it. I was able to relax enough to let her do it and then they went to work. They were filling the cavities and I kept kind of.. gasping for breath. I’d stop breathing and have to inhale really hard. They noticed and asked if I was okay. I said I was having trouble breathing. It felt like I was swallowing water or something. The dentist said “okay well I’ll just finish up this second one and we’ll be done. I can’t find the other two cavities anyway.” I don’t know much about dentistry, but that threw me for a loop . How could she not find them? She saw me just a few days prior and found four cavities and now she can’t find any? I didn’t go back to that office and see a new dentist now and I have yet to have them tell me I have a cavity. I don’t like speculating, but it almost seems as though I never really had any cavities to begin with. I want to ask my new dentist about that experience but I’m a little shy as I don’t know what to ask. Does anyone else find that odd? I know I should have asked them about it, but I’m very shy and struggle to speak up. It’s something I’m working on.