About 12:30 This Morning I Had An Allergic Reaction, It

About 12:30 this morning I had an allergic reaction, it was from Avacado Oil in sun burn releife. Went to the emergency room and they gave me an epi shot, and a sterroid. 14 hours later I am still very jittery, have a massive headace and not feeling well. There is a weather system coming through and I am sensitive to that and get very bad headaches. But would the worse headach and jittering be a result from the epi?