I need some advice

So I have a 7 month old daughter who i am very over protective of mainly because she is my first so recently I've noticed I've been feeling a bit odd about certain things I really don't know why it just is something that rubs me the wrong way or makes me a bit annoyed so I usually send my daughter with my hubby to his parents so they can see her and spend time together and she usually has fun over there since she plays with his little siblings but recently I've been noticing something that seems to bother me a bit is that the younger siblings will sometimes take photos with my daughter (i don't mind them taking photos making memories) the thing that is frustrating to me is when photos of my daughter is on social media... I get it that teens will be teens and post photos but it's just I don't want my 7 month daughters photos all over social media... for 1 I never get tagged in them for 2 no one ask me before posting her photos... and for 3 I don't know who his siblings have following them on Instagram idk why it kinda just iritates me I told my husband about this since one of his sisters had a photo of our daughter and her as her profile picture on Instagram. He tells me oh get over it. It's just a photo... I barely even post my own daughter on social media... am I just over reacting??