What do I do???

I have an ob appointment tomorrow and my daughter has been vomiting all night I don’t know if I should take her out knowing she’s sick,or should I miss my ob appoimtment and it’s all on me!!,my husband won’t miss work to help me I understand sometimes you can’t but now I’m trying to figure out going out while my babies sick, and I don’t know what she has could be something she ate,she’s in the phase where she puts everything in her mouth, now I’m stuck should I still go to my ob or cancel??? Also have been having some pain so that’s why I’m considering going if I wasn’t I would cancel for sure but what to do???