In a heartfelt revelation on Instagram, Janelle Brown of “Sister Wives” shared her recent scare with skin cancer, a story overshadowed by the subsequent loss of her beloved son, Garrison Brown, the very next day. Janelle Brown, “Sister Wives” star and one of Kody Brown’s many wives, has recently been through a whirlwind of emotions. Besides mourning her son, Garrison Brown’s, tragic passing, Janelle faced her own health challenges and opened up about it only a day before Garrison’s death. The matriarch bravely discussed her skin cancer diagnosis and treatment, sharing her story on Instagram in…