OCD

A lot of people in my family tell me that I have OCD, but I don’t know if I can believe them. I always have to check my house for any unusual smells. Make sure my doors are locked and everything is unplugged, all the lights are off and I always convince myself that I miss something or I somehow accidentally moved something that could be dangerous and it’s a cycle. It happens every night and I can barely sleep. I always have these thoughts that if I don’t do something, then I’m gonna die or I’m gonna get killed in my sleep or I’m just gonna die in my sleep and it scares me even more. If anyone has gone through this or something similar, please tell me some tips and tricks