He went soft during sex

I think we rushed straight onto sex there was no foreplay so he was semi hard but still quite soft. Then he became fully soft we stopped having sex them I gave him head( oral sex) then he became hard again and we continued with the sex. It’s really playing on my mind because I think maybe he’s not attracted to me which is really knocking my self confidence or is it normal? Can someone explain to me why this this might of happened