How To Help A Choking Kitten?

My kitten started choking on a toy. I was able to dislodge it from her mouth and she’s been ok since then, but now the same thing seems to be happening more frequently. When I try to remove something from her mouth, she gets upset and basically chokes herself again so I have no idea what the problem is.

She’s a 3 year old female cat who lives with me & my husband & two other cats in our small apartment. She also goes on walks every evening around the neighborhood with us (we only walk about 30 minutes each night). We don’t know why this is happening or how to help it?