what is going on here?

Well in the most confusing twist it seems that AF has shown herself about 5-7 days early with no warning , which never ever happens to me.I have no idea why this is maybe stress?The thing is I have no real cramps but the flow is red and medium to heavy.The no real cramps thing is confusing as I have endometriosis and I always have bad cramps during AF. I am not sure if this will really mess things up because I am supposed to wait 30 days after the rubella vaccine to get pregnant.I did get the shot 3 days before my cut off to get it and that would put me only about 1-2 days off of the 30 days if any as I am not sure how I respond to the meds and we maybe transferring a couple days later than thought anyways.Also my RE was booked for February originally so I am not even sure they could squeeze me in for a transfer.I tried calling the office today and my donor nurse is out today UGH! So I have to wait for answers until tomorrow.On the other side of things if this doesn't mess anything up this means we will be transferring a lot earlier than I thought.Like a week or so earlier.