slow leak ?!?!

i think my water is leaking slowly. it's 1 am now. at 10 pm i noticed a small leak of fluid , i decided to change panties & see if it continued leaking which it did... very little. now i'm in bed with very mild contractions about every 15 mins. kind of rather wait till the morning to go get checked or call my doc ( i tried calling her tonight no1 answered). i got a membrane sweep yesterday, so maybe that could be why i'm leaking a little? do u think i should go in to L&D and check it out tonight or i should be fine checking in the morning? i'm 40 weeks + 2 by the way