Sorry to hear that you aren't feeling well.

You do have to be careful of fevers, read up in your pregnancy books on the best way to deal with those as you can't have a high temperature while pregnant. I think that fever would most likely be the cause of something going wrong, most pregnancy books say that a simple cold without fever is Ok. Just take plenty of fluids and rest a lot so that you give yourself a chance to get over it quicker. Extra sleep might knock it over and take a few days off work if you aren't feeling well. Try not to stress, this won't help bubba and just make you feel bad. Hope you feel better soon.

Phone your doctor or ob so they can ease your worries.