hi all, please can any one help

i'v just watered my baby's an there were little white creepy crawly's in excess water, in the outer pot's that the main pot's are in, i normly take the pot's with the plant's in out of the outer pot's about an hour after watering to catch the excess water, an to let air get to root's, but forgot to take them out the last time i watered, 2 day's ago, can someone tell what they are an are they a big problem? an how to get rid if need be, thank's for reading,

any help or comment's welcome, i'm in a bit of a panic now