Anybody else get stuck babysitting someone else's kid and it makes you panic?

Currently 19w+2d pregnant and I'm watching my friends 9mo son for a bit while she runs to the store. A bit after she left, he woke up and was smiley and playing peekaboo, then he started crying. I went to take him out of his car seat, but he didn't want me to. Now he's calm because I put Bluey on.

I've never been good with babysitting kids or babies, unless they were my own baby cousins who I was comfortable being around. But now that I'm pregnant, everyone expects me to watch their babies to "get used to it" but it makes me panic and cry. I don't know their babies routine, I don't know what their babies cries mean, etc.. I'm just waiting for her to get back so I can relax and possibly cry after she leaves 😅

Does this mean I'm not ready? Whenever someone hands me a baby and I visibly panic, people tell me I'm not ready for motherhood and it makes me doubt myself. I know it'll be different with my own daughter when she's here because she'll be my daughter. But still, the doubts creep in when I have so many people in my ear telling me I'm not ready.