I've gotten prickily skin while out in the sun for 3-4 hours, eve...

I've gotten prickily skin while out in the sun for 3-4 hours, even with sunscreen, and then noticed a relatively severe burn, though it has gone away after two days. I am also taking two other topical medications for acne that increase sun sensitivity as well. I've also been more irritable, but that is difficult to seperate as I'm about to be moving states, which is stressful. I'm going to keep taking it, and try to keep closer stock of whether or not it's affecting me.