Am I being ghosted?

I've been talking to someone off of a dating app for a month and I thought things were going well. I invited them over to a mini movie party I was having with my other friend and they agreed. It seemed like they enjoyed it. But after that day they started ignoring me (No seen or anything). I didn't want to seem pushy but since it's been 4 days I asked them if everything is okay. Still no reply. I could see that they're pretty active on Instagram still but they can't see my messages?

I'm just kind of worried. It's normal for like a day to go by without a reply from them but not 4