There are lots of natural treatments you can try until you can get formal diagnosis and treatment: https://www.additudemag.com/category/explore-adhd-treatments/natural-treatments/. Exercise may be the most beneficial and can be done for free.
As for the job struggles, have you tried an employment agency? They can test what types of jobs would be a good match , offer job skills training, and help you find a job.
Here are some strategies to finding the right job when you have ADHD:
Penny
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism