Implantation???

I don't have a picture to post, but this morning when I wiped, there was a little blood, it was very small and kind of bright red. Then this afternoon I wiped and there was a brown spot on the toilet paper (and no I didn't go number 2, so it wasn't poop). According to the calendar/app, I ovulated on the 4th and I baby danced the 1st and 3rd. I took a test the other day and it was megative, but could this be implantation and change to a positive in a couple days when I test again? My period isn't due until the 18th. I've had some cramping, and maybe some constipation/diarrhea, but that's about it. What do y'all think? I've been TTC for about 3 months in my new relationship. Send baby dust! My only child is 6 and has been asking for a sibling since they were 2 and my bfs kid is 9 and also wants a sibling. Please tell me what ya think! Thanks! Here is a pic of what I got tonight while getting ready for bed.