Combinations - LSD after Ecstasy?

[Darksanity]

SWIM has planned to do LSD in 2 days and he started thinking about rolling tonight (just one E pill) but he was wondering if doing E would deplete his Serotonin and make him a bit depressed for the next days wich would make higher chances of a LSD badtrip (consider it's SWIM's first time with LSD). Would 5-HTP supplementation cut the E's "post-depression". SWIM didn't really have does "post-depression" episodes after rolling... He just misses the buzz very hard (not like a craving, but like : ohh it's sad... it's already over... it was so beautiful). So what should SWIM do?

Thanks