Hi Gabi
Without more information I cannot b sure what is happening, however I can tell you that it is nothing to worry about. If it was an infection it would have been detected by the swab. If it is your waters then because it is only a small amount of fluid and it stops quite quickly there is no danger to you or your baby. Both you and your baby produce fluid throughout your pregnancy so any fluid lost will be replaced. The other things I can think it could be is an increase in CM or urine both of which is normal.