I felt a sudden,sharp pain on back of hand by knuckles, like a sting or an insect bite. I immediately sprayed Benedryl spray on it, then held my hand on an ice pack -- both within a minute and a half. I do not know if it was a wasp or spider because I didn t see or hear any flying insects, though I know I just walked through spiderwebs in a barn. I did just slam into. Now, an hour later, i still feel tingling in fingertips and down my two fingers. Do I wait it out to see if it improves, or should I go to an after-hours clinic???