need some more opinions

So I know none of you are doctors but I'm at a fork in the road. Back in 2014, I started experiencing these weird symptoms: lightheadedness, hot flashes, SOB.. After a few months a felt something in my neck; ultrasound of my thyroid showed a small nodule, nbd. Now, 2 and a half yrs later, I still get dizzy & my hot flashes suck. Many blood tests have shown all my hormones are normal & my neck has been swollen since 2014 so I made them check my thyroid again. They found another nodule on the other side of my thyroid & that the other one grew. Can the nodules be causing my problems?? I haven't had any answers and I'm sick of this lol Also, I'm 18