Leaves pointing downwards

63F daytime temp is a little low - and if there's wind from the outside blowing on her, she's just too cold. Normally, I would say she's either been overwatered (which is the state of being constantly wet, NOT how much you give at any one time) or underwatered (don't see the other typical reason for drooping leaves which is a nitrogen toxicity) but in this case, I think the culprit is the cold wind... close the window! And let her dry out completely before giving her anything more to drink... lift the pot up, if it's super lightweight, she needs something.... if you can still feel the weight of water in her, she doesn't need a drink... I also tend to think you rather shocked her with the nutes you gave her... pretty strong for this age plant... do not increase them the next time you feed even if the chart ways you should - listen to your plant instead! Good luck!

you look to have virtually no perlite or similar in the soil, so expect this to occur after an irrigation. when you irigate, you absolutely should get the entire volume wet. in soil you want to minimize runoff to preserve the nutes that come in the soil. whereas in soilless you want at least a 10% runoff waste. I promise you can dump fairly large volumes of water through a substrate of soil, coco or peat, if it has the proper drainage qualities and never see a droopy plant. in any soil or peat based substate that has a larger holding capacity, you'll want up to 50% perlite or similar added. coco coir holds about 2/3rds teh volum so you only need up to 33% perlite -- you often see 70/30 premixed and that's no coincidence.

Overwatering! Let the soil dry out for 2-3 days and after water from the bottom. Place the pots with the bottom inch inside a bowl with water for 1 minute a day. When you do this the roots need to search for the water and develop a healthy root system while the roots placed above the bottom inch still got enough oxygen available.

I am guessing either over watered or cold temps or both. The soil needs to be well aerated. I don't see much perlite, rice hulls or pumice in that soil and it looks very wet.