It could be i had spotting very light pink on the 29th and 30th and on December 31st got a +++++. so anything is possible.
Could implantation bleeding happen at a later point? I'm 32 days into my schedule, and I only spotted on day 30 and 31. Could that have been implantation bleeding? No sign of my period yet...
Well, if it looked like implantation bleeding and it happened a week early, then yes, you could very well be pregnant. The only way to know for sure is to test! Best of luck!