What Causes Clear Slimy Discharge Turned Pink Without Smell From Vagina?

For the past two-three weeks i have been having a clear slimy discharge no smell, no irritation, no burning or stinging. I was due on my period on 5-4-2014 and didnt come on until 13-4-2014 but this period wasnt normal it was thin bright red blood mixed with the clear slimy mucus this lasted for 4days on the 5th day (today) it turnt to brown/pink slimy discharge and towards this evening back to the clear discharge. Im constantly feeling wet these past few weeks. Ive also had heartburn, minor dull pains in lower abdom that come and go, insomnia during the night time and tired in the daytime. What could this be?