Week 14 pregnancy almost fainted on mrt

Anyone experience blackout, cold sweating, vomiting feelings while on crowded peak hours mrt? I almost fainted and blackout on mrt this morning but luckily there’s a lady let me sit at her seat and it took around 15min to feel better. Anyone experiencing the same around 14 weeks pregnancy and how do you deal with it? #pleasehelp #advicemommies