TMI brown discharge after plan b start of period ?

I took plan b 11 hours later after he pulled out June 21.

I got off BC June 10 and had a withdrawal bleed June 12-16.

Now I’ve had spotting this whole week and then today I noticed I have brown discharge it’s gettin heavier with clumps. What does this mean??? Don’t know when my period is coming next.

It’s been two weeks since the event and I’ve tested and it’s negative.

So does this look like the beginning of a period ???