Question! Does getting jaw Botox make me look like I've lost weight?

I feel like my face looks wide every time I take a picture, so I'm considering getting jaw Botox.

People around me say my face looks much slimmer, but some people say the change wasn't as big as they expected.

For those who have actually tried it, were you satisfied? I'm also curious about when the effects started to show and how long they lasted! Please share your reviews :)