AF due 18th December!

I had some belly cramps Sunday then on Tuesday I had a slight bleed but nothing big was when I wiped only happened on one occasion and hasn't since could this be implantation bleed? I am now exhausted I can't stop yawning just wanna sleep and my breasts are feeling bit tender all symptoms of both. I have been trying over a year now and only just went for a continuous of bloodtests to follow up if there's anything wrong I'm really hoping this will be my month but I don't wanna get my hopes up Incase it isn't will be a huge disappointment :( what do you think? It's too early to test!