HELPPPP

i was 10 days dpo and i tested negative. my man nutted in me on July 29th, so this week is 4 weeks since my last period but recently i started bleeding and normally when my periods come they’re heavy at first and then will gradually get lighter, but this one was lighter… it was so light that i didn’t need a tampon, i bled for 4 days very lightly though. It started light pink then would be brown with a hint of red in it… has this happened to anyone before, i’m scared to test because i want it to be positive so bad and another negative is just gonna devastate me 😭 i also forgot to mention during the 10 days dpo and even now im cramping like period cramps but my period is just not giving period…