You may want to reconsider breastfeeding. Your baby is getting mercury from you this way. I know that they preach that breast is best, but they forget to tell us not if we have metal fillings.
I too am a stay home mom on limited income. We refinanced our house to get out the fillings. I just had them all removed on Teusday this week. It took us three weeks to get the second mortgage to do it. Since you have about the same number I had, you may want to find a someone trained by Hal Huggins or IAOMT to safely remove them all at once. This is the way I went. I did start off by having two teeth done last year. But I got a little sick. I decided if I were going to get sick, I might as well do it all at once. Rather than repeatedly for three years.
You cannot breastfeed during removal, or after either as you will have higher levels of mercury temporarily.
With the number of fillings you have, I would say you are affected. Alot of your symptoms sound familiar. Check the IAOMT website to locate a properly trained dentist to remove your fillings. Many of them offer financing options. Check where you can cut back, extra car, cable, etc. Anybit helps.
It can seem like a mountain, but you can get there. If you have dental insurance they will cover some of the removal, and it may cost you less. I did not have insurance, so it did cost us $5500 and we had to travel four hours away. But I too have kids who need a healthy mom. Keep your chin up and start looking for options.