Postpartum bleeding

So I’m 4 weeks postpartum and have been having the bleeding since then, but for the last week or so it’s been pretty light, more so just spotting unless I’m going to the bathroom, then I get a little more. But today It’s been heavier . Not soaking a pad in an hour but filling a pad after probably like 2 hours ish. which it hasn’t since the first like day or two. A lot of it is dark but there’s also quite a bit of red blood. Is it possible my period came back before the bleeding Fully stopped ? Or is it normal for it to come in waves? I’m a ftm and confused