implantation bleeding

I seriously think I just had implantation bleeding. I felt my ovaries cramping 4-5 days ago, and we've been going at it pretty much every day. then today I had a little dark spotting and nothing else.

this will be our 3rd and I've been wanting one but now that it could be reality I'm so so nervous and 2nd guessing and trying to figure out how everything will work with 3 and my working and school ect. I know I'm overthinking... is this normal guys? gaaahhhh!!!!