Can i be pregnant ? Implantation ?

Ok so my period is not due till Jan 19 area , but this past week I’ve had back pain , bloating and constipation and cramping her and there and also boobs are sensitive . I thought back and the week before that i had a very very faint red tint when i wipe , i took a test and it was neg but it would be to early i would think . How soon could i get a positive and could it be implantation. I have kids but it’s been awhile and i always got morning sick that’s how i knew before.