Please help what is wrong with me?!?

I think I'm losing my mind. Just earlier I realised that my girlfriend was manipulating me. Only after I called her out on it did she say she was sorry. Now I'm so worried that if I haven't been noticing that I've been manipulated before, what else could people be doing to me that I don't know about?!?! What if I'm in my own world and I have no idea I'm being used. What if I'm gullible, and naive and innocent AND DON'T EVEN KNOW IT. What if everyone is manipulating me... there is soo much that I DON'T KNOW! Gaaaaaaaaaaaaah.