Naomi,

Sounds like you are going through a tough time atm. You certianly would be feeling worse for wear if you have a cold. I don't think that there is anything else you can take for the cold. I would speak to your OBS or midwife and see if they have any other suggestions.
I can't answer the BH q cos, I haven't been getting any, but it sounds fairly normal to me. He probably is running out of room. My bubs has been quiet the past few days, but is starting to get more active this morning. I don't get as many kicks now, more big movements.
Alan might pop in and give some advice.
I hope you feel better soon.
Make sure you rest when you can and drink plenty of fluids.