Anyone have implantation bleeding in early pregnancy? HELP!?

Hello- I am confused,& hoping to get some feedback. I believe I just went through 'Implantation Bleeding' but am not sure if it was just a light period. My periods are always very regular & heavy. This month I started pretty much on time. I started off spotting (I never spot),slight cramps. (My cramps are usually horrible and last all week) I didn't bleed the first day at all, just had a pink hue when I wiped. I blead 'normal' the next day, but it wasn't heavy and it was dark in color. I stopped for about 2 days.. (still had some pink when I wiped) The 4th day- I started w/red blood for maybe an hour- it stopped&did the same thing 24hrs. later- which also didn't last. It has now stopped completley- there is no more pink hue when I wipe. All this is very un-normal, and I am confused. Is it too early to take a test if it was imp.bleeding?Anyone else go through this? BTW- I am not on BC & we use the withdrawl method- we wouldn't mind having a child- Im just confused. HELP