Is it too late for implantation bleeding?

Mi

I got positive home pregnancy test yesterday at 7dp5dt. It’s wasn’t super dark, but I could see a line. Today I have a decent amount of brown spotting. It’s kinda late for implantation bleeding, right? I’m trying not to panic. My beta is tomorrow. I would expect to see implantation bleeding days 4-6. I’m so stressed. I still have period like cramps. I’m praying this is late implantation and not AF. WTH is going on????