How dangerous is it to swallow fish bones?

Hello. Today i (20F) was in a hurry and ate about 15 medium pieces of fish. I don’t know how they were cooked and what type of fish they were. I didn’t feel any bones or anything hard when biting or swallowing however i did eat quickly and took big bites as i was in a hurry. Now, about 15 minutes later I’m wondering whether i swallowed a huge amount of fish bones and whether this can cause internal damage such as intestinal perforation.

What do i do? What symptoms should i be on the lookout for?