So I left apple juice in my water bottle a couple of days because I couldn't find it and I threw…

So I left apple juice in my water bottle a couple of days because I couldn't find it and I threw some soap in there last night and couldn't see because there were no lights on and it tasted really weird and I just thought I needed to wash it better in the morning. Well when I was washing it I noticed the straw and the bottom of the bottle had black spots on them and is it mold? Should I be worried that I drank out of it with the spots in it?