TMI-Implantation Bleeding?

Megan
I had sex with my husband about 6 days ago. 
Today I have mild cramps. 
Also, a touch of what seems to be...well this:
I'm feeling confused. I have been exhusted, but I am also a mother to a 3 & 2 year old boys. Plus no more then 5 hours of sleep the last two days. Also extra emotional. 
I'm not sure if my mind is playing tricks on me or what.