i was stung 3 times in my right arm/hand @ 30 hours ago by hornets.  The sting site is not horribly swollen however still hot to the touch.  I woke up this morning with a terrible stiff neck and headache and got a nosebleed about 2 hours ago.  Not sure if they are related or not.  Can a bee sting cause any of these issue today?
Bee sting is allergic. Take tablet cetirizine for allergy.  Tablet paracetamol 500 mg for relieving pain and stiffness. Bites are less so do not worry much. You will be better soon