^ the risk of seizures is very real - you were lucky, one of our regular posters has a seizure on a prescribed dose of tramadol so be very, very careful and I would not recommend anyone exceeding 400mg in 24 hours.
Also be aware that tramadol has serotonergic effects (increases serotonin levels in the brain) so you shouldn't really take it with anything else that might also do this as it can cause serotonin syndrome which can be deadly - this includes SSRIs, MDMA, DXM and I have known someone have serotonin syndrome combining it with LSD..
All in all it is a very complex drug pharmacologically. Not meaning to scare you at all OP, enjoy your experience but be aware of the potential dangers.