2001 Ford Ranger

i have an automatic transmission on my 2001 ford ranger. when i take off from a dead stop while in drive there is a feeling at first like i have a trailer that is just catching in the first foot or so of driving. after that it drives like normal. if i let off the brake real slowly then i won’t feel it, but if i put my foot on the gas like normal then it just feels like i’m catching something that i’m towing.