my main question is..... does brown spotting have anything to do with a period?

i am 2 days late and on the second day of my missed period i went to the bathroom and wiped and saw brown spotting.... it was very late but was brown... i was wondering... is it a sign your period is coming.... or if your eggo is prego?...cuz i ALWAYS have cramps about a few hours before my period comes... but this time nothing... i was on the needle for 3 years and got off about 11 months ago.... my doctor told me that i would possibly be infirtile 6-12 months because i have been on for so long.. but still possibly concieve....my cycle is always on time or even earlier... i know brown spotting sometimes has something to do with implantaion... but i cant be sure... i hate the waiting game cuz im gonna have to wait 4 more days till i can get a test (when i get some money)...i just find it weird that im not feeling cramps

my last period was april 4th....and i had sex april 19th and 27th.... my due date was may 2nd