Anal..poop after like?

What is ur poop like after u do anal for the first and second time? I did it about a month or so ago and ever since then my poop has been diahrea like and it’s not painful but it’s not normal for my body poop to be like tho...is this what happened to u? For how long? Should I be worried? Is this normal? Should I go to the doctor? Does this mean he gave me something?