What Causes Diarrhea And Pale Stool After Taking Antibiotics?

Hello, I have a question concerning stool color and texture. Earlier in the year, I took some antibiotics and since then I have had loose stools, kind of airy, with some episode of very very mushy stools almost like diarrhea but only once per day and back to soft stools the next day. Also, I have noticed that my stools are lighter in color, pale orange, and I can see some rest of food from the previous day. I have been quite anxious since the antibiotics episode... Can it be that my gut is still not back to normal? Is it that I am digesting food too quickly (bowels every morning with what looks like the food from the day before)? I had a stool test done some months ago which came back negative. Any advise? Thank you.