Using a swing or rocker for a preemie?

Shaquanda
Would you recommend using a swing or rocker for a preemie? I know every baby is different, just want to know what others think. My son was born at 33 weeks, and he may be able to come home within the next couple of weeks. Is a swing too much for his little tummy? I had my daughter at 29weeks, 3yrs ago and i used a swing for her. The only thing is that she constantly cried, so i was never sure if it was the swing that was bothering her. Suggestions please☺