TMI implantation bleeding? my baby is 8 weeks old today

So I just had my baby 8 weeks ago. He is 8 weeks today! I have need exclusively breast feeding the entire time. We have had sex around 3 weeks pp like 3 times and he pulled out. At my 6 weeks check up I was negative pregnancy test thank God. But we have thin condoms and they have broke like twice now. I just got in progesterone only birth control so it won't effect my milk supply. And I haven't had a period yet. But I went pee this morning and wiped and got this..... and it's totally stopped I hope it's not implantation bleeding. :/ could it just be spotting because I am breast feeding? Some don't get periods for awhile while breast feeding. 

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