You log "Dual Received" up until your solo, after that you log PIC time, unless of course you entered IMC during the flight, then you log "Dual Received" and "Actual IMC" time for the portion of the flight that was IMC. Also, all your I-rides under the hood are logged as "Dual received" After your I-check, you log PIC time for everything until you went to T-38's, then it starts over again until after solo... Except, of course, you were then technically "Instrument rated", so all time post solo was "PIC".
In other words, unless you kept all your line up cards, a PITA and not really worth it. Go to the FSDO and get your Instrument, multi engine (Center line thrust restricted) ticket and call it good. Start keeping track of your shit.
Edit: More rules