It doesn't worry me either, personally I love dummies, I love the noise she makes when I give it to her after shes been crying, kind of nom nom nom lol. I too bought them because of the sids advice, was also told that if baby is sick whilst on their back the sucking motion helps baby swallow rather than choke, having observed this first hand I'm inclined to agree.
I originally bought tt closer to nature dummies as I was breastfeeding but Sofia hated them, ended up with the tt cherry which seems to be a popular choice and she is happy with them
tbh she can take or leave them and only once or twice a day actually needs them iykwim x
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