Clingy toddler while pregnant help!

Honestly idk what advice to give I am In exactly the same position as your are and there’s nothing more exhausting atm x

My daughter's a bit older but she had the same reaction to my pregnancy. We figured she was trying to get attention by acting like a baby again, so we started giving her attention specifically for being a big girl. She's been responding really well to a reward jar — she earns it for doing "big girl" things and can spend it on treats like sweets, a play date, or screen time.
Some of her "big sister duties" include helping with the laundry, filling the dishwasher, helping me plan our walks, and spa days where we do bump care and face masks together. She's also in charge of our snack basket, and she helps decorate our nursery, picks baby books out and clothes, etc. And then we ensure we have family bonding time routinely ❤️