If you include more specific details about your conditions and desired outcome, you may get more pertinent advice. Please do not give up your anonymity if you choose to do this.
The thing to do now is educate yourself about the process. I recommend this website and
http://www.militarydisabilitymadeeasy.com/ as a starting point. Then I would read your service's regulations concerning the IDES process, VA regulations concerning disability (38 CFR Part 4), VA DBQs, etc.
Your focus, aside from education, is to get better by visiting medical providers when you have symptoms/problems and following their advice. Documentation is the key to obtaining your desired outcome. Your records meet the various boards -- you may only meet the FPEB. Unless you wish to have a fit finding; sucking it up will not help you.
There is most likely a significant amount of money riding on the outcome of this. Civilian attorney fees seem expensive; not obtaining your goals can easily be much more expensive.
There are reasons to hire an attorney before the IDES process even begins, but this doesn't apply to most people -- however, it may apply to you. Once you are in the IDES process, you should make a decision concerning an attorney. Many folks wait until they receive an outcome they don't desire to hire an attorney and then it is more difficult and less likely for their attorney to obtain the desired outcome.
Questions that may help shape your decision:
1. How contentious is my issue(s)?
2. Do I understand the process, regulations, laws, case law, previous board decisions, that affect my desired outcome?
3. Will I regret not hiring a lawyer if I do not receive the outcome I desire? Will any outcome be OK?
4. Can I afford not to?
Hopefully more people will chime in with questions to help folks make this important decision.
YMMV.