Loss of appetite?

I had preterm labor 33 weeks. Had all the meds, but stopped taking the procardia unless I have contractions bc I kept feeling like I was going to pass out. But my blood pressure today was 107/71, which is lower than it has been most of my pregnancy (I stopped procardia on Monday). I know the procardia lowers blood pressure. But I’ve just been low energy, low appetite and also weight loss (like 6 lbs) in the last few weeks. Now 34, 3. Is this just a new stage of pregnancy or side effect of all the labor-stopping meds?