By mistake given vizylac gg sachet.

Dear Sirs, My baby is 2.6 years old and his weight is 13kg..in morning he did vomiting which is sticky and foul smell and after vomiting within 2min he did potty which is loose motion but it's not watery. He is not eating anything also hw is not taking water but he is very active. We have given vizylac gg sachet on 5pm after that on 7 pm we have given ondemn syrup 5ml and at 8 pm I have given curd rice he ate very little after half an hours again he did loose motion 2 times but it's not watery... And 11 pm we have again given vizylac gg sachet...so I m very much worried...is it overdose??? What should I do now.. he did urine 4 times ..little N Yellow color..pls help me out...is it overdose?. And after how much hours of gaps it should be given sachet ???