For four days I been bleeding brown blood does anyone know why? I already had my period

Postpartum bleeding question?!

I’m a month and half pp and I stopped bleeding a week ago, I just went to the bathroom and I had dark reddish brown blood. Is this still the pp bleeding and not my period? Or could it be my first period?

Somebody please help me!! ....I had my period June 21-27th and on July 2nd and by that point I was off my period for 5-6 days already I started bleeding bright red then pink brown and I told my sister and she said it could be implantation bleeding and ever sense then I been feeling cramps like mild cramps and throw upy and then on July 4th I started to bleed again bright red then pink brown then brown and by that point I was 7-8 days off my period still feel cramps from time to time and throw up...

Need some reassurance. TMI sorry in advance. I stopped bleeding about ten days ago when my baby was 5 and a half weeks. Husband and I have been having unprotected sex using withdrawal method since about 4 weeks PP, and I'm exclusively breastfeeding. Yesterday I randomly had some light spotting it was clear discharge with pink to red streaks. I'm freaking out that it was implantation bleeding!! Has anyone had this happen to them? Tell me your experience? I'll be okay with being pregnant IF that's...

I'm 5 weeks PP today. I stopped bleeding completely at least a week & a half ago, but started again today. My question is, is it still PP bleeding or my first period?

P.S. I'm not breastfeeding