Dental

I'm so frustrated right now I can't stop crying. I brush my teeth twice a day, but I haven't been to the dentist in at least a year due to a lack of insurance. I went today and they told me I have sixteen cavities. How the hell I have that many cavities is beyond me.. I don't eat a lot of sugar. All they said is that I need to floss. My husband never flosses and he brushes once a day and has no cavities. They said they can't do dental work until your third trimester which means I won't be able to get pregnant now because I need all of these teeth filled.