I'm 6 and a half months post partum and for the last week I've been getting some strange feelings; sore tummy on one side and what I've thought were phantom kicks. Ive also been getting mood swings and insomnia like i did with my first pregnancy. Decided to do a pregnancy test tonight and it came up with the FAINTEST line 
Did a digital and it was negative. I believe they're not as sensitive so I'm going to do another first thing in the morning because it's nearly impossible to get a false positive. Has anyone else had an experience like this?