Feeling lost

I could really use some life advice. Just to give you alittle background before I get to my question.

My whole life I've always struggled in school. My elementary school years were tough, my parents had to help me every night with my homework.

I was an unorganized mess but managed to have ok grades. I can't imagine where Id be without all the support they gave me.

I was diagnosed ADD in junior high and put on ritalin(a small amount) and given extended time on exams.

My average throughout most of high school was a low B, and I particulary struggled with math and science.

Generally, Ive always had to take more time than most people to solve problems and finish my work. Frankly it feels embarisingly slow sometimes.

In college, I worked my ass off and received my bachelors in engineering from a well respected school. Extended time and adderall(much higher dose than in highschool) helped me tremendously through my degree. Well... I have mixed

feelings about the adderall. Now I'm in my mid 20s and unsure what I want to do with my life. I've held two different engineering positions and I feel as if I've underperformed in both.

I'm tired of working so hard in a profession where I feel like I'm not half as good as my peers.

It's important I mention that I went off my medication after one year on the job. I did this because my emotional health was very poor and I wanted to see if removing the meds would improve my mental health and perhaps my lackluster productivity.

After a year off meds I went to see a psychologist about my ADD diagnosis. He tested me and said I didnt have ADD.

The past two years off medication have definitely been hard. At first, I couldnt get anything done and was unmotivated, but as I've learned to cope without medication I'm starting to feel

better than ever. Particulary in how I handle stress and my emotions(adderall can make a man crazy). Anyway, I'm contemplating moving into the managerial side of engineering. I feel my speed to solve problems

wont hurt me as much there. The diverse array of skills management draws on appeals to me. I'm not bad at everything, I just take alot of time to break down problems and make decisions.

But I'm worried my poor analytical abilites will hold me back even in management. Honestly I just feel like im not that smart sometimes. That extended time and medication allowed me to get through college and that I have no business

being in the tech world. That I would be better off and happier doing a simpler vocation. Its important that I choose a job I can thrive in, for the sake of my mental health, job security, and financial well being. I can't spend my life doing shit I'm not supposed

to be doing. But I feel the simpler road, the easier road, is selling myself short. So what should I do? Do I keep pushing my boundaries or do I choose something easier. I'm worried I'll spend two years in a manager position just to underperform again

and go do something else.