Has anyone been prescribed Diflucan for a yeast infection while pregnant? If so, what was your experience and side effects with it?

I’m currently 5 weeks, I was prescribed 150mg, and last night I had mild to severe cramps, had a bowel movement but later on, I almost had diarrhea with tons of gas and a I felt a little nauseous... it finally subsided but note, I had not been drinking enough water and yesterday I drank a ton and had a salad for dinner. Any thoughts?