Morning Diarrhea/Anxiety

Recently, during my fifth and sixth weeks of 50mg Zoloft, I've experienced heavy morning anxiety upon waking, then morning diarrhea. I've had no other symptoms, just the diarrhea in the mornings, topped with heavy anxiety, think the two can correlate along with the Zoloft dosage? I've had it 3 days last week, and some loose stools this week, then today I had diarrhea again. Any opinions would be welcomed.

I will provide a timeline of my diarrhea, which always occurs in the Morning, more or less.

6/17 - Morning Diarrhea
6/18  - Morning Diarrhea
6/19 - Morning Diarrhea
6/20 - nothing. - consumed alcohol at night.
6/21 - normal, though loose stool.
6/22 - nothing. consumed large quanity of alcohol.
6/23 - two loose stools, but solid.
6/24 - one loose stool, little watery.
6/25 - nothing.
6/26 - dark diarrhea.

I've also been drinking heavy amounts of soda (coke) during the day at work. Diet has changed slightly. Still have an appetite.  If anyone could help me, I'd be very very appreciative.