I took divorce from my husband last year because he was a cheater but cant adjust myself till now.?

I donot know why this happened to me.Why he ruined my life.I simply cant concentrate on anything.I am a muslim and live in bangladesh where divorce is considered a stigma.I am a pharmacist but jobless.Sometimes i think i should study further or go to some country abroad but for that also money is required which i donot have much but i can give registration exam of pharmacist abroad and go there but its difficult so i get terrified that i will not p.I donot know what to do and what not to do.I am asthmatic also so my health gets bad when i think too much.I now have a fear that i will not have a marriage again and if i have then that person would also be bad.Please please help me get out of all this scenario and give answer to me in detail .Please................