Implantation bleeding?

Took a test 7/19 pm and it was the big fat negative. Took two this morning. One was negative and I swear I could see a shadow of a second line on the second test. I also have been having some lower right sided back cramps but I get those everyday so I didn’t pay any attention to them.

Had sex the day I ovulated and the two days following. Fiancé & I have been trying 6 months and we want it to happen SO bad.

Period isn’t due until the 23rd 🤞🏼🤞🏼

Spotting was yesterday (7/19) for about an hour then stopped and picked up about noonish today (7/20). bbt spiked today and this time in my cycle last month, it was trending down.

Yesterday (7/19)

Today (7/20)