Dealing with Trust Issues in a New Relationship

I think I have trust issues. I’m brand new to a relationship with this guy and whenever I’m around him I feel really comfortable and calm and happy but sometimes when I’m scrolling through Insta, I find these posts about like “getting what you deserve” and “knowing your worth” , “not settling for someone who’s not worth you” , “if a guy doesn’t x then he’s not worth your time” and I keep saving them and when my boyfriend said he had news to tell me I thought he was going to break up with me . I’ve been having doubts that he’s really the best choice for me. I’m just giving myself a chance because I’m new to dating and think I’m just going through uncomfortable moments in order to get comfortable. I just keep having doubts but I think my expectations are just too high and I’m expecting him to be perfect but he’s not so I just am learning how he is…