Best advice my doctor gave me when I was pregnant with a cold: drink a glass of water every hour on the hour. Watch the clock. Also, keep a bottle of water by the bed so when you wake in the night, drink some more. Yes, you will make many trips to the bathroom, but it flushed out my cold and I felt so much better, too.
When they say to drink plenty of fluids, why didn't anyone ever tell me exactly how much? I have been drinking lots of water with colds ever since and I go through colds so much quicker!
Sleeping propped up in a recliner might also help.
Hope you feel better soon!