Need suggestion for my vomit problem during travel?

i used to get vomitting sensation n sometime used to vomit when i travel for long distance.usually if we plan to start to travel early in the mrg(bfre 7) i wont have anythng.i wnt feel like to have.yday i hve been to newyork frm new providence i travel thro train then bus thn boat to statue of liberty i had my lunch at 12 in subway when gng to time square i started to vomit frm 4 to 9 pm may be 6 to 7 times.whatever i have even water comes..i really got tired...i felt lke i will fall down..i dont knw how i came back.my husband n my frds were there with me.on 23 rd i m planning to go to niagara for 2 days with my husband my 1 yr old son,my cousin n my husbnd frds...i need suggestion what precaution i should take bfre gng and what i should take with me and what i should i hve when i feel vomit n after vomitting.......i am in indian...i am new to american food...wht shall i do for food in tht two days...plz help.