Am I being paranoid?

I’m 16 weeks and have been having severe nausea and diarrhea for most of my pregnancy so far. I get really bad stomach aches that aren’t gas. Its so bad I’ve called off of work a lot. I told my doctor over our telephone visit yesterday but she just told me to take fiber. I just feel like something’s wrong. I’ve also been having digestive problems way before pregnancy and my doctor did nothing. Am I being paranoid??? Also, I have anxiety and depression so I may just be overthinking my symptoms.