Obsessive Compulsive Dissorder discussion

I need help. i think i have ocd. if i like someone or something i become obseesed with it to the pint hwre it's almost all i think and talk about and i have about 5 things like that. and also when someone makes a noise or a movement over and over it tends to bother me where it's like all i can notice and think about until it stops, almost to the point of me having to go and make then or it stop. its really bothering me and i was wondering-if there are either A. any doctors, specialists, or peopel who have it who can tell me if this is it, or B. if there is a checklist online or somehting. thank you so much.