Diarrhea with lower abdominal pain and nausea

I'm 12 weeks 4 days pregnant. Recently, I've been feeling heartburns and lower abdominal pain, a few days ago diarrhea started kicking in with severe head ache and constant stomach pains. Meron ding yellowish discharge na nagamot naman na with suppository na nireseta ng ob ko. Di pa ko nakakabalik sa ob ko. Pero I wanna know kung normal ba to? Or it is something to worry about?