Wednesday: 3 units, right side. Awesome experience, 2 hours of action, took a while to go away after orgasm, but didn't need Sudafed or any helpers.
Saturday: 3 units, left side. Also awesome, 1.5 hours, went away after orgasm.
Sunday, 24 hours after Saturday's action: 3 units, right side, going along great after 1 hour of sex and right in the middle of heavy awesome plowing of the wife: deflated while banging.

Totally unexpected reaction on Sunday, and a huge bummer. I can't account for why the different reactions each time, and would love some consistency in the reaction.
Normal? How have you dealt with this?