Some of the MDxx varieties cause people to hallucinate, although its generally pretty mild if present at all.
A good number of piperazines have shown to be very powerfully weird hallucinogens. Many other phenethylamines are hallucinogenic.
Were your pills tested? did you eat the same pills for each re-dose?
I wouldn't eat pressed pills unless I had seen them tested in front of me and were unadulterated. Many of the pressed pills I have recieved have been very much not MDMA. The sensation of waves or rushes is something described by many users, but MDMA in its own right is not typically the sort of hallucinogenic experience you experienced.