Help!!! Plz!!!

So I had moved all my plants outside on my front porch for the summer. When it first started getting cold again I didn't have enough room in my house to bring them all back in yet, so I put them all in my little greenhouse for the time being. I ended up getting way busier with work and temps dropped faster than I expected. Now a few of my plants need to be nurtured back to health. I'm mostly concerned about this one and would love some advice on what to do for it! She's extremely droopy and not her color is slightly off. I don't want to shock her system too many ch and end up killing it. I've this plant for years now!

Plz and thank you!