mmm yeah i guess it doesnt matter...well ill bring it up to my doctor but im sure she will say that its still a period therefore im due in oct...ugh and i just cant wait anymore, but im of course not doing anything to rush this baby. they just kinda got my hopes up when they changed my due date from the 16 of oct to the 14th of sept cuz thats what it looked like i was measuring and now they did an u/s a couple of days ago and we went back to oct but the 8th and i was already exited but i guess ill just have to wait till my baby wants out.
It doesn't matter if it was a three day period it is still your lmp. But you could talk to your doctor about this if you wish. Just like me my last period Dec 7 wasn't really a normal period either and I talked to my doctor about this and they said even a little or hardly any bleeding is known as my lmp. So that gave me the due date of Sept 12.
It may have just been spotting that you had in January. I don't know all that much about it but if your cycles are always 28 days then in December you would have had your period from around the 13th to the 20th. Sorry I can't help more. I hope you figure it out x