[MEB and benefits]

To be short and sweet i found out I am facing an MEB today. i am wondering what i might expect for benefits and how they work. Some ppl say you cant take va compensations if you get 30% MEB or more. others say i will have to pay back my separation pay if i take it ($90,000 maybe). and i really dont know how to judge what money i will make outside the Army. i have bad feet, ankles, knees, hip, back, left shoulder, ptsd, anger issues, migraines, sleep apnea, restles leg sleep disorder, depression. if all of these are 10-20% 140-280 %  what do i do?