First ever grow! Auto Girl Scout Cookies

Start of week 10 Day 63, shes looking fantastic. Drinking water like crazy and loving her nutes. Really filling out and the buds are thicker everyday. My 2nd plant should be done in around 2 weeks so shes going to get a lot more room soon. The thinner leaves are leading me to believe she will be a sativa dominant plant. Not sure though, just some amateur thoughts. Day 64, she looks amazing. Shes getting thicker everyday and the buds are really putting on weight. There are trichomes all over and shes starting to put off a minor smell, more of a regular soil/plant smell than a cannabis scent. Really excited to see how she does in the next few weeks! Day 67, very excited with how she is doing. Filling out everyday, really liking the nutrients and seems to be drinking water like crazy. Will be giving her another watering in the next 2 days. Just checked on her at 4pm and looks like she now has a phosphorus deficiency, seems to have happened overnight. Going to flush her tomorrow with a little extra bloom nutes hopefully that will stop it. Day 68, just flushed her with ph'd water and some bloom nutes hopefully that will correct the P deficiency. It didnt look too bad to me, only 1 of the fan leaves was really affected while the other leaves had minor spotting on them between the veins. Hopefully I diagnosed it correctly cause she still has a good amount of time left. FastBuds says it shouldve taken 10 weeks but it looks like its going to be alot longer than that. Day 69, went to check on her and the damage has spread to almost every inch of the plant. I have no idea what this is and Im not good at diagnosing. Not sure its a Phosphorus deficiency anymore. I gave her extra bloom nutes yesterday for Phosphorus but over night the spotting/damage doubled. Please help! Day 70, what I thought was a flush is just a normal watering. Rookie mistakes. Gave her a real flush this morning and will be feeding her later this week. Hopefully the flush cleaned out the medium and we can get her back on track. Theres a bit of a smell coming off her, and her buds still seem to look great. Shes going to have alot more room soon when I harvest my Glueberry OG Auto so shes going to get alot more attention.