I just got over (I hope, last day or so) a cold and it wasn't as bad as usual (I quit smoking before I got pregnant, so no chesty cough this time!!!). I used olbas oil to help the blocked nose, lots of lovely tea with honey and cough sweets (all available from Boots); only needed one dose of paracetamol BUT am very tired so resting even more than I was, if that is possible....
If you continue to feel bad, perhaps go see the doctor just in case? I was able to take one dose of cough syrup with codeine one night as had a hacking tickle at the back of my throat, and was TMI peeing in my knickers every time I coughed (was at home, but was embarrassing as my OH kep asking what would I be like at 9 months if I was going through 5 pairs of knickers in two hours --I asked if he would make those comments to the baby when he went through 5 nappies!) and it 'kicked' the cough, if you will....
best wishes