A Memphis woman battling cancer was told by doctors that she had less than four months to live—but she recently married her longtime high school sweetheart. Gracie Jeppsen, 20, suffers from a severe brain tumor, but she wedded her boyfriend Seth Madsen, 21, on Thursday, June 17. The two lovebirds started dating while in high school, before being separated for three years when they went on different church missions abroad. Upon returning, Gracie was diagnosed with a severe brain tumor on April 1, and she started her treatment at the St. Jude Children’s Research Hospital a few days later. The blastoma had spread to her head, causing severe back pains—the reason she decided to end her mission prematurely. The duo then decided to get married, initially planning for a small wedding until their plans changed when Gracie’s social worker at the hospital became her wedding planner. “When St. Jude called and …