Jealous Again

So I'm currently 13 weeks pregnant after having a mc in February. Lately things have seemed pretty great with my fiance(been together 11 years next month, other than a couple times we split due to him being an asshole and talking to other women and me finding out) the past 3 years have been really good for the most part

So there's this chick that used to be our downstairs neighbor when we lived in an apartment complex, all the neighbors used to hang out and party together back then. She's friends with both of us on Facebook. She recently went through a break up with her husband bc he beat her. And now out of the blue my fiance is constantly liking ALL of her sappy and depressing posts, as well as ALL of her pictures she posts, and commenting things like 'dont lose your light lady', 'keep your aura glowing', shit like that. Knowing his past, it really pisses me off! He knows I still dont trust him 100% so why in the hell would he say stuff like that. I get she's depressed but honestly he doesn't need to get involved imo, shes halfway across the country and he's supposed to be worrying about My feelings, not someone we knew briefly a few years ago

Are my hormones getting the best of me, or do I actually have reason to be upset?