yes indeed orchids can get bugs, i think most members can tell you that first hand--
With sap, I would keep an eye on that plant, wipe down the leaves with rubbing alcohol 70% and wait and see. If cottony looking things are around you might have mealies, if you see tiny white things running around could be aphids, i know my descriptions arent completely accurate. Sometimes I do find that happy plants or new growths have that sticky sap stuff like cattleyas
let us know what you find!