Weird thing in belly button?

Okay so my belly button was randomly itching so I itched it and felt something inside of it. I clean my belly button every day (when I shower) so it kinda freaked me out. I haven’t noticed it ever before. Well I went to try to pull it out and it start to make my stomach hurt. So since I can’t see into my belly button I took a picture. Can anyone tell me what this is? It’s attached to my belly button on the inside. I’m also 27 weeks pregnant