Anyone know why?

TMI.!! For like a month or two now every single day literally everyday I have to poop every single time after I eat or even randomly I’m driving or doing something n my stomach starts hurting n I have to go bad. Most of the times it’s diarrhea but sometimes it’s regular. My bad for TMI but it’s so embarrassing😭 most of the time I can’t even hold it 😭 I’m 19 n my diet is alright I guess I do eat fast food or whatever there is but I’ve been going to the gym recently n trying to eat healthy n since the beginning of this year I’ve only been drinking water sometimes energy drinks or if there’s no water I’ll drink a sprite lol. But can anyone help me 😭 I have a 2 yr old idk if having her via c section affected my stomach.?