Thank you for your query.
Do not worry about using one dose of paracetamol
beyond the expiry date. It is not going to harm you or your baby. Paracetamol has a long shelf life and as abundant caution the manufacturers give a short period on the label. At the most the medicine will not be effective.
Regarding the cold
which you and your daughter are having I suggest that both of you have some decongestant/cough
medicine for an early relief. If it has been persisting for some time then it is advisable to consult your doctor.
I hope I have answered your query to your satisfaction. Please feel free to revert back in case you require any clarifications or would like to share more facts of the case.
Wishing you and your daughter an early recovery from cold and fever