I have pretty severe allergies (pollen, mold, dogs, cats, some foods, etc, etc) and what you describe doesn't really sound like an allergic reaction. Well, at least not the getting pale part.

The hives on your hands could be an allergic reaction but not to the weed if it happened 2-3 days later. A skin reaction, like hives, tends to happen within minutes of exposure not days. A vaseline allergy perhaps??