Singer/songwriter Jessie Baylin suffered a nasty allergic reaction to medication for an infection on Saturday (09Mar13).

Baylin, who is married to Kings of Leon star Nathan Followill, told her followers on Sunday morning (10Mar13) that she had been battling ill health, stating, "Sick as a dog. Thank God for mothers... this has hands down (health wise) been the worst week of my life. Begging for mercy at this point."

New mother Baylin returned to the website later on Sunday to detail her health battle and thank her followers for their support.

In a post, she writes, "Thanx (thanks) for the get well wishes. Bad infection & last night had an insane allergic reaction to meds (medication)... much appreciate the love + prayers."

Baylin and Followill became parents to daughter Violet in December (12).