Last night, I was given a cup of mugwort tea by a friend and I started drinking it. I was drinking it for the first time in my life and my mouth and throat started to itch and hurt after about 4-5 sips. I stopped drinking it immediately but my throat, chest and stomach hurt for a few hours afterwards. I thought I might be allergic to it. The symptoms went away but since the morning the itchiness and weird feeling in my throat and mouth is still coming back, especially after I am eating something. I had I had plain rice and cereal for lunch and dinner and the sore throat and the weird uncomfortable feeling in my throat and tongue is still there. Since dinner, the feeling is not going away. What is the reason for this and what do I do?