Can I still reopen a personal injury case?

I settled my case last year around September with no future medical. I am still messed up from my injuries and mental condition if anything I keep getting worst. The reason I signed was because I was almost 3/4 years in to my case. They didn’t want to give me more than what they were offering they were giving me extra checks that I had to pay back with my settlement. And my lawyer was saying she couldn’t do anymore for me, to me it sounded like a bad situation. My money situation was bad at the time I had my kid in the hospital and I am bipolar. I was not in the right state of mind when I signed everything was like rushed I was supposed to see my psychologist before I signed but with my state of mind and my lawyer didn’t push me to see him first I signed. I don’t think she understood that someone with bipolar disorder will make unstable decisions in a bad situation is like I was someone else at the time. My physical and mental condition keeps getting worst I need help. Can I reopen my case I feel like I got taken advantage of my bipolar disorder? When I still needed mental help and physical treatment and way more money to continue in my future. I felt like if I kept fighting my case I was going to owe them back more in extra checks than my settlement and I was already in debt with people. Please help me out or point me in the right direction if you can. Thank you for your time.