I think that it depends on the individual whether you feel them before or after... either way your window of opportunity is here. And I have a feeling I know what you will be doing tonight!
bfp #1 12/25/08 mc 2/5/09 at 10w6d
bfp #2 6/25/09
bfp #3 2/28/11
Re: O pain
BFP #2 - 6/24/09-mc 7/25/09 @8wks
6/09 Dx w/PCOS--Metformin & Progesterone
8/09 Dx w/Compound Hetero MTHFR--Neevo, Metanx & BA
BFP #3 - 1/11/10 - DD1 born 9/16/10 @39w4d, 8lbs 14oz & 20in.
Heparin from BFP to 34wks.
BFP #4 - 10/4/11 - DD2 born 6/2/12 @38w1d, 8lbs 11oz & 21in.
Same med protocol as last time, but heparin continued until delivery.
BFP #5 - 3/30/14, EDC 12/10/14!!
Beta #1-76 (12dpo), Beta #2-238 (14dpo)
I have read differently than what browniris posted - that you almost never feel O at the moment it happens, but O pains happen before or after.
I seem to get them the day before, just a little.