Nurse told me any pg "symptoms" before 5-6w are generally medication side effects (for those of us on meds) or psychosomatic (which I experienced during 8 yrs TTC so believe her). That said, I attribute the sharp cramping 1-2 days after transfer to implantation - although could have been P4 supps. Also both FET's during the 2ww I experienced: sore throat, congestion, breast fullness and (tmi: wet dreams) - got love those drugs (immunosuppressant, estrogen, progesterone). Fatigue and nausea came near 6w for me.
Congratulations on being PUPO!!!
TTC#1 2003 BFNs, 2004-2009 5 angels above
2010 IVF-PGS-FET#1, DD b. Aug-2011
TTC#2 2012 BFNs, 2013 FET#2, DS b. Nov-2013
TTC#3 2015 BFNs, FET#3 (my 6th and last angel above)