Can someone help me understand wash sales and when I can buy again?

I sold MU for a profit 8/12. I rebought 8/19 for lower entry and got a wash sale on it.

I had five shares of MU so they said it triggered bc some of them sold for a loss? I didn’t realize when you sell all shares it does them separately like that?

If I rebuy again, will I get another wash sale today? So if want to wait til 9/13?

What if I sell my current rebought share at a profit. That won’t trigger a wash sale right?

Thanks for any help. New to this!