My 5 month antediluvian tot sucks on her tongue to one side. Is that majority?

My baby girl of 5 months has recently started sucking on her tongue to one side. Is that regular? My sister said that is not normal and I should tell her doctor nearly it. I just figured she realized she have a tongue so she is chewing on it to one side. Should i be concerned about it? Since she was 2 months she has be sticking her whole fist in her mouth and the only point you can see is her wrist when she does that. It's kind of funny to me because she gets so mad at her foot and then shoves it in her mouth. Should this worry me?
Answers:    nope.it's common.its just the little indivuality from the other babies..you could mention it but.theres no point.she's fine

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