I think my cactus is sun shriveling. I bought it a couple weeks ago before a massive heat wave here in Central Valley CA. I moved it to more shade as soon as I notice but it appears the top of the cactus is wilting and starting to look like rust where the thorns are. She’s been watered well.. but I might be overcompensating by watering before the soil is completely dry. Is there hope for this pretty mama?