Thyroid problem?

I went to the doctor and told him I had put on 40plus lbs in 6 months I eat healthy exercise. I told him Im tired alot, headaches, the weight, and I feel like something is stuck in my throat at all time it drives me nuts. Could it be thyroid? Can the thyroid cause you to be moody extremely moody? he is doing blood work etc just wanting to get some ideas etc
Im almost 30, my mother had discovered thyroid problems when she was 34 so I pray its nothing serious cause I know what my mom goes through with it and other issues that have risen since
I did get my blood work done around 830 am after took the kids to school , also I get a ultrasound of my thyroid and throat etc in the morning