Is it normal to be aroused by the female body but straight ?

So I’ve recently got into a relationship with a guy whom I really like and think I’m falling for and him for me too. I never really thought much of this until we started getting serious. The sex is great and we get on so well but I can’t stop overthinking I may be bi or something and thinking of all the worse possible scenario Incase I do end up finding out I like girls in that way and end up hurting him and myself possibly. I only get aroused by the woman’s body and have never actually thought or imagined myself much with a girl physically or sexually just their bodies turn me on nothing else. I overthink this so much that I think it’s taking over the sex and I’m thinking so much about how I’m feeling I’m not truly enjoying it. I honestly haven’t stopped thinking about it since about 3 weeks now it’s just constantly in the back of my head. I really don’t think I’m interested in girls other than their bodies but I have been looking for answers everywhere and it’s givibg me all types of answers which is putting me off finding out and making me think even more. I feel as though some of my experiences in life have shaped how my thoughts work now and may have rerouted what turns me on. ( I got sexually abused/harassed by my own brother for many years and now I just think rubbing/feeling me up doesn’t do what it used to) and also watching so much porn over the last 5 years probably and having no physical relationships which I’ve read online that porn can kind of distort what turns you on. Can anyone relate to this or give me any advice? I already feel better after typing this as I haven’t told anyone. I just don’t and have never imagined myself with a girl and would never actually think of going further than just looking at their bodies. Thanks