Wait for the cold to improve or go away before you start pu.pd. If she looks better, and you think she's ready then start.
For an older baby, make sure it's a hysterical cry, not a protest cry, that you pick up at. When you lie her back down, put her on her tummy, since that's her sleeping position. (older baby) If she stands up, lie her back down, but put a little bit of pressure on her if she tries to pop up again.. kinda like you're blocking her from standing up. She will get upset.. but it will be an angry cry.
Be patient and stick it out. It'll take a bit, but she'll get through it.