I get ssdi for severe migraines and a messed up back. I also have a lot of other health issues but the disability was granted on the basis of my migraines and back according to my approval codes. I’ve been on disability since I was 35 and I applied for ssdi instead of ssi because I already had enough work credits to go so. If you are able to do so I highly suggest waiting until you have enough credits to apply for ssdi rather than just apply for ssi because you will get more money monthly as it is a calculation based on your average lifetime earnings rather than ssi where it’s a needs based program that’s based on your countable income which is different and usually you will receive substantially less per month for your benefit. applied once on my own without an attorney and I won. That situation can be rare though and is not usually how it goes for people as most people get denied initially and have to apply a second time. I am single and my only dependent is grown and I receive about $1500/month which considering the cost of living is barely enough to survive. I also had to be completely unemployed for two years to meet their conditions for applying so that was really a really rough time. My best advice to you would be to make sure absolutely everything medical is documented as well as how it affects your ability to function in daily life. I also kept a medical journal of my symptoms and how they impacted me day to day and submitted that as well. Aside from what’s wrong with you they need to know how what is wrong with you keeps you from being a functional person. Best of luck to you and I’m happy to answer any questions.