Kinda Upset

So I had a miscarriage in August after ttc for 10 months. I am pregnant again now. We posted our announcement picture on Facebook and I said my rainbow baby. Obviously I’m aware of what a rainbow baby is. When I had my miscarriage I didn’t write a bunch of posts on Facebook about it. I did post on infant loss Remembrance Day mentioning my loss but it wasn’t something that I plastered all over Facebook because we hadn’t even told anyone we were pregnant yet. So we posted our announcement yesterday of our rainbow baby and a girl on my Facebook that I used to work with decided to message me informing me what a rainbow baby is and saying it threw her off reading it. I am a mother, I’m very aware of the term rainbow baby and I understand that she was probably just try to inform me of something but it kind of hurt me because I mentioned in my announcement about this being a healthy baby and hoping everything goes smoothly. I literally made a rainbow of flowers around the ultrasound picture. Like why would you assume that I haven’t been through a loss and assume I have no clue what the term means? I don’t know maybe it’s my hormones but it kinda hurt my feelings. In order to use the term rainbow baby do I have to post my miscarriage experience all over Facebook?