I'm feeling weak and drowsy right after getting stung by a wasp. is that normal?

No: You might be having an allergic reaction and should seek medical help.

This is not normal.: Sting symptoms may include pain, itching, swelling, redness ; tenderness of the affected area.Milder allergic reactions: swelling of > 4 inches, nausea, GI cramps, diarrhea. Severe allergic reactions may present with swelling of tongue, mouth, lips or throat; difficulty swallowing ; breathing, wheezing, tightness of the chest, hives, generalized weakness, confusion ; slurring of speech. Get.