Hi ssflying,
You can find more info on that in your FCTM under "Abnormal Operations" then "Miscellaneous" and "Overweight Landing". The answer to your question is yes if the approach climb limiting weight is not satisfied with CONF3.
LikeABoss,
As per FCOM Procedures Go around, PNF retracts one step the flaps, ending up in CONF2.
Cheers.
Give us a LINK showing where this is written, many thanks.