strange yellow spots

This is my first grow and im growing partially indoors and partially outdoors( i move the plant out when its nice and sunny and bring it back in just to keep it in the light for the proper anount of time)
Recently its gotten some wierd yellow spots just on the bigger fan leaves and just on those leaves, the tips are turning brown, could this be nutrient burn, burn from the indoor lights or pests.
Any help would be awesome. ( side note, its well over a month old and getting close to the 2 foot mark, but has yet to show sex, do i have to send it into flowering to get it to show sex or nay?)

i wouldnt worry about it for now. just keep an eye on it and keep us updated. Loos like maybe water droplets focused light and burned the leaf a little. Very minimal damage, so again just keep an eye on it and keep us updated with pics. you will get much more response with pics. You can also post it under the category: plant problems and they might have some input