What Is The Best Depression Medicine To Help With Depression,

what is the best depression medicine to help with depression, anxiety fear of leaving alone, keep going back to my past life that I had with my fiancé that died and I was with since kids, elementary, middle, Highschool college to adult hood. Don't know how to move on with my next life with the person Ive been with for 9 years and had a baby by but I keep going back to my past life tht I previously had a child with him too and she is 14 years old. Other daughter is 5 years old. I need something to help me move forward and stop comparing everything to my past life. I will be happy in the beginning but it gradually leaves and I fall back into this severe depression and mess my life up along with the person I am in the relationship with. I can't stay happy and stay in the present. Please help I'm trying to find a medication to help me stop overthinking everything and live for now.