Many times I am scared that I am manipulative and when I text someone or say something, I check what I say so I'm not being manipulative

I am really scared of being a narcissist.. I’ve been in therapy and I feel like my therapist isn’t taking it seriously:( like if I am a narcissist I want to work on it I’m just really scared of harming people.. including my partner:( I don’t want be the reason he needs therapy and I don’t want to ruin his life. I’m scared I’m manipulating him somehow to want to be with me and I just don’t know what to do. I NEED to get this fixed before our relationship progresses but I just feel like I’m not being heard by therapists/psychiatrists We want to get married and have children but I don’t even know if I will be a good partner or mom. If I do have narcissism I just think it would be best if I left him alone :( I don’t know what to do I know that people will say that narcissists don’t care about hurting other people or things like that but I just don’t know how true that is. I also have really mean judgmental, cruel, and hateful thoughts about people and I feel like that means I’m a narcissist

sometimes, to try and prove my fear wrong i’ll be like “ okay, let me think of this REALISTICALLY. would i REALISTICALLY feel this way or do this thing? “ then i come up with scenarios in my head on how i think i would realistically ( or logically ) do something but then my feelings go against that thing i thought of then i start getting anxiety and start to fear that i would actually want my fear to happen or that i’d feel a certain way that proves my fear true. it’s basically just checking how i feel about something i think of to try and prove my fear wrong, checking my emotions or checking how i think i’d realistically feel towards it.. but then i may react “ unrealistically “ it goes wrong and i freak out

So, if I'm retelling a story or relaying information to someone, after I'm done speaking, my brain will send me thoughts like, "What if you lied? You might have told the story wrong! You're lying!" I've started second-guessing myself, even when I know I'm not lying or telling the story wrong😭 This has also bled into twisting my intentions behind certain actions... For example, the other day, I'd been babysitting my younger brothers. I'd gone to use the restroom and thought, "What if the door isn't locked or closed all the way?" Because this has happened once in the past. Turns out, it didn't lock correctly, and one of my little brothers almost walked in on me, but luckily, I shut the door in time, and we laughed it off. But then, I kept getting thoughts like, "You knew that would happen, and you didn't double-check! You wanted that to happen and for him to walk in!" :( I know this isn't true, but it's so annoying! Has anyone dealt with this? If you have, do you have any advice on how to deal with these thoughts?