D.M.
You are going to get a lot of great advice, so I'll just stick to what my son's Pediatrician told me...when kids are sick they need love and comfort and it's okay to hold them and make them feel better. Once the cold is over with an infant it can be tough to get them back to the 'usual' routine of sleeping comfy on their own.
She's gotten used to you coming for her and comforting her and making it 'all better' and that's okay. What you need to do now, is show her and guide her back to that sleepy time routine. Please try to not let your little one CIO, at this age there is so much evidence that your little one just doesn't get why you aren't coming to help her.
When my son was sick, we had already been co-sleeping since he was 2 mos. and home from the NICU. He got used to me cuddling him or sitting up in the rocking chair to get him to sleep. I tried to slowly work him out of those comforts to other ones...
At that point, we got a cuddly small dino toy that started to replace me as the cuddler and while it took time, we made it through it. I would hold it with us while we slept and eventually migrate away from him. In two weeks, he was over Mom and the cuddle to get to sleep and even eventually got tired of the dino toy taking up his space! You can sort of do the same thing with a crib sleeper. Talk to you little girl, she will understand more than you think. Remain calm and use a loving tone, any stress is a tip off that something is wrong and they just want you to hold them more. As my son is older now, if he wakes in the night and calls for me, I rub his back and tell him I am here if he needs and explain he needs his rest and he's safe. You can do something similar with your little one.
Don't worry, it's not the worst thing that can happen! Follow your gut instincts and you'll find the answers.
Good Luck.