Fair pay?

I make 13 an hour, I usually always get over 50 hours a week. I am literally carrying this business. I am the lead and only technician, I am also the Lead installer. Im also pretty green when it comes to my job but I know what to do and how to do it efficiently.

Its literally My helper and I, The boss, and the secretary. Two of our techs quit 4 months ago and we havent rehired since.

I feel wrong for asking for more pay since this is a family business, but I bring in 90% of the businesses income. At 13 dollars an hour.

What should I do