Can i get peoples thoughts on this , i really do love her and dont want to mess things up 🙁

Im going through this "phaze" were im always thinking about my partners past and people who she has been with, im always worried that she is going to do something that will sabotage out relationship or has done in the past, im currently going to therapy for this and some days it helps and some days it dosnt, sometimes this just gets a bit to much and my anxiety will start playing out situations in my head and makes me believe i am always right, she has lied to me at the begining of our relationship which sort of broke the trust as i came from a relationship that i was cheated on, this makes it very hard to take her word for anything she is saying, could anyone share their thoughts on this on how i can be better for her she is such an amazing woman and i dont want to loose her because of my bad thoughts