sorry for the three unrelated Qs

before or after the imam? i feel confused about it.also,ibliis is whispering/throwing some stuff in to my heart especialy when i am reciting my daily morning or afternoon zikr(remembrance of almighty allah) and i dont utter it but say acudibillah mina sheitain rajiim,what more can i do to minimize it.

finally,relationship problem,i am failure at girls,i cant relate to them.,i am easily stressed.i have OCD phobia about intercourse especially cleanness,STD phobia.i guess,i am gonna die single into old age(which is not bad by the way),family is pressuring me into marriage and i tell,marriage will bring only more stress into my life since i am now still struggling to find good job.what is the best course of action in this situation.