Sunburn after hair transplant 7 days, should I be worried?

After my hair transplant i went on holiday, after 7 days i did a tour on a scooter, and the weather was cloudy / sun. When the sun came trough i was wearing a hat. In the eve at home i saw mine forehead was red. Not massive, but it had def some sunburn. My head was fine, maybe it was protected with the scabs yet? But Iam really worried that this is affecting the results. It is after 5 weeks now and in the front my new hair doesn't fall out but is not growing either. Thanks Ronald