This may sound like its coming out of left field but you have nothing to lose by trying a bottle of Fleet enema right about now.
Protip: The Fleet bottles are refillable. Just use clean water for a follow up clean out.
Much of what is considered cold related symptoms are really not clearing the shit out of your intestines.
All it costs is $1.50 and a few minutes in the bathroom. It's cheaper than a doctor and works faster. It won't conflict with anything if what you are experiencing is worse and your colon will thank you.
Give it a chance. Get someone to get a Fleet enema bottle as soon as you can if you can't get there on your own.http://www.webmd.com/drugs/2/drug-14831/fleet-enema-rectal/details