its worse to have too much oil than to have to little oil. u should drain the front sump as ttt mentioned. the front sump doesnt have too much oil in it and will drain quickly. then just refill the oil to the correct levels.
next time dont add oil until your car gives you a warning and tells you to do so.
Current: 2013 F10 M5 & 2013 GLK350
997.1 GT3RS (gone)
2009 WRX STI (gone)
e92 M3 (gone)