Thick clear stringy discharge...what is this?

I have been having really bad clear sometimes yellowish stringy discharge all day. I had a light 2 day period about 2 weeks ago. I had unprotected sex with my fiance' about 2 months ago and 5 days ago. I have been pregnant before and I really am not having any symptoms that I am aware of except for bad headaches and feeling tired alot more than usual. I have a 10 month old little girl so I am not sure that is why I feel more tired than usual. This is a really stringy very thick discharge with no smell and no burning or itching. Can you help me find out what this may be.