If you sold 75 calls, your shares should be taken. If it closes .01 in the money, which it did at 75.02, the contracts are executed and you will receive your money minus commissions, likely to hit your account today or tomorrow. I sold 85s when it was at about 84 early in the week for a buck that at least lessened this painful drop.
From a technical aspect, the stock has broken the bollinger bands which has not happened in about 7 months since prior to summer earnings and also slid through the 50 day. This move actually looks identical to 17-24 June when it went from 54 to 47 in price and then rebounded prior to July earnings back to 58. While possible based on no wick forming Friday that it slides a bit lower, very likely to rebound back to 80+ in the next couple weeks.