spotting!?!

Cori
Hey ladies so I have had some spotting for two days... today it's been a moderate amount... almost enough to where I need a panty liner... 
it's not time for my period nor am I cramping or feel like I'm going to.... I have had intercourse 2 times in 3 days and it was not rough. I'm not tender down there at all either... it's just weird... lol. 
so I guess my question would be, what  implantation bleeding like? I know it's different for everyone, but I would just like some input...
Thanks in advance!