ladies i need opinions!😥

I was simply playing with my fiance new phone and was scrolling g through his Instagram, we don't mind doing this to one another it's a common thing so it's not like I was being nosey, but I saw he commented on another females picture "Just simply beautiful!😍😘❤" , and she commented back "❤❤", im very uneasy about the fact and jealous but he has never been the cheater kind of guy, but we have been bickering constantly the last three days (ttc stress), I'm wondering am I over thinking it or should I confront him? I deleted and blocked this girl from his Instagram and I didn't find any messages from her. I'm very confused all I know is I'm uneasy and alittle upset😭 need opinions😭