Sales sucks, IMO. I don't understand the mental or emotional make-up of a person, who actually likes what is effectively begging people to spend money. I'm not surprised you don't like it--and I'm actually glad you don't!

I think most people loathe the job, but they do it because the pay-off has the potential to be significantly better than a job their skills can command on the market. Most of the time, though, I think it evens out to a little over minimum wage--stretched out over a year. And, it's unreliable. Moreso, the most productive ones are the most deceptive, manipulative, dishonest, backstabbing sonsobitches that ever crawled across the earth.
I would guess approximately 1% of salespeople actually like what they do. (See: "crawled across the earth")
Unsolicited advice: Go to school, even a tech school, in a field you have a talent or affinity for.
At least try. You may make within the range (with the boys as dependants) that you can get financial aid.
Even a certificate to enable you to demand a bit higher wage would get you off a salesfloor and doing something you can live with. You can parlay that into more classes, better jobs... The boys will learn something incredibly valuable from you. That would really be the biggest payoff. Plus, they're about to need expensive help.
If that doesn't work, a basic fulltime job with a steady income for the family, plus online classes would be another option.
Once you get a plan of action toward a goal that excites you, don't let anything take you off track!
I'm hoping the best for you.
I think your hospitalization may be a glaring indicator that the fulltime gig route is hazardous to your health. Your family needs you to make a wise decision.
Best wishes and pre-emptive, well meaning, pseudo-apology for nose too deep in business....