I am so sorry to hear yoou were denied. Do appeal. You can do your own appeal if you want. Also contact SSA and get your records to find out more about why they denied your claim. If you get a lawyer they will need it anyway.
They appeal is just about the same application as the first except you can only put in what is new since the date of your denial and anything you forgot in your first application. Depending on how thorough your first application was and how much medical evidence you submitted, also the RFC (Residual Functional Capacity) form from your doc and an Adult Function Report from you, there may be a lot of evidence you can submit with your appeal.
Chances are not in your favor, 86% get rejected with or without a lawyer.
If you decide to appeal on you own you need to work fast becausse of the time line.
Good luck, hang in there.