Irritating thoughts. A proper solution!

I am male heterosexual man,I was seeing porn on my phone and one day while scrolling in the phone website I saw a transgender porn video and I saw it by mistake and since when I saw that,my mind got irritated and I couldn't see normal hetrosexual porn and in that week when I again wanted to watch porn and started browsing,my mind had unwanted thoughts of transgender people,maybe if I see I would get attracted to them,or am I gay for thinking like that etc,but  thinking about it irritates me and I was never sexually aroused by it,while always I had been straight my whole life and had physical relationship with girls.Even when I watch porn and masturbate to normal sex videos, irritating thoughts like I should watch transgender porn,you should chec kout if you like them all that stupid things irritate me.Why is this stupid thought not going away,thinking about it makes me puke.Please give me a proper solution