Diarrhea?

OKAY, on top of being 16 weeks pregnant, i have diarrhea.. like severe going to the bathroom every 30mins-hour.. Ive stopped drinking soft drinks and only drink water, lemon water, orange juice, and occasionally Sunny D, i eat much cleaner now, and I’ve cut out junk food entirely. I guess because this baby hates all of those things it was sorta by force and not my choice haha, BUT i feel much better except for this diarrhea. & i feel like i can’t get enough to drink. CONSTANTLY thirsty. Is this normal when you change your eating habits?