My face got really tanned after going outdoors over the weekend. Will the whitening laser treatment be effective?

I spent several hours in the sun at a festival last weekend, and even though I diligently applied sunscreen, my face turned really red and got a dark tan. I hurriedly soothed it with aloe vera gel, but the tanning hasn't gone away and the dullness remains, making me feel depressed every time I look in the mirror. Is it okay to go to a dermatologist right away for brightening treatments like toning or vitamin care? Or should I wait a bit longer for the irritation to completely subside? I'm not sure, so I'm asking for advice. Please leave a comment if you have successfully reversed sunburnt skin.