Oh man, that's so hard when your little ones are sick! Sometimes, I think what happens with kiddos is that they get used to the comfort. She was sick and hurting and you were there, with cuddles and sympathy. Now she's feeling better but her body is confused, it still wants to wake up at night and she's feeling lonely.
My best suggestion is when she cries, (unless it's one that you know means business) count to 10. Sometimes it's more a crying out than a cry, and they'll settle back down. We went through this with our youngest who was hospital sick with a Kidney infection. She was waking the same time each night, but she'd fall back asleep on her own if I didn't go in and cause any other noise to wake her right up. If she settles, then great! If not, go in, pick her up, cuddle her and then lay her down in bed. Keep telling her you're there, rub a back etc. If she cries, again pick her up until she just settles and the repeat. It feels frustrating but it only takes a few times and she'll go back to sleep.
Either way, no matter what you do, she'll eventually settle down. Being sick is hard on them and it takes awhile to recover (think about when you're super sick...takes awhile to feel back to yourself). She just needs a little more from you for a little longer. I say, since you've noticed the pattern it can be changed long before a habit is formed.
And remember, all habits no matter good or bad can be broken with consistancy. And no matter what you do, as long as you love her you're doing the right thing for your family and your baby. You're a great Mom and you're doing awesome!