No danger here at all. As stated above, I too have hippyflipped many many times. In reality, it is quite possible you will have a better roll because of the shroom experience a few days prior
Hippy-flipping is the most enjoyable and tolerable experience where the level of erotic physical enhancement is just at the right level.
Unlike the 400 mg of MDAI and the 100 mg of 5 or 6 APB that I consumed in 2016 where The wind from the ceiling fan blowing across my nipples would cause a non-ejaculatory orgasm.
The orgasm lasted for a minute or two and would spontaneously recur for about 2 or 3 hours. The entire trip was about 12 hours of What Alexander Shulgin call something between a rolling +++ and ++++. It was so intense. I believe I actually lost consciousness for significant periods of time.
It was so erotically stimulating that It was almost unbearable.
There must be a mechanism of CNS induction of male orgasm by combined 5HT1/2 A/B/C agonism caused by phenylethylamine combinations with or without indole alkaloids or tryptamines.
It's of interest to Note that almost everyone subjectively identifies hippie flipping as a much more erotic sexually enhanced and stimulating experience than just MDMA. The addition of MDAI which is also an indane (a structure related to an indole), magnifies that effect even more when coupled with an Benzofuran
Candy flipping (combining MDMA and LSD or a comparable 5HT-agonist hallucinogen to LSD in potency serotonergic profile and drug-drug interaction with MDMA. It's a little bit more overwhelming IMO, but honestly the MDMA softens the trip in an extremely agreeable way.
I've only ever tried it with actual LSD, the newer substituted phenylethylamine hallucinogens that are active in the 100 to 500 microgram range 10 to cause severe and many times fatal peripheral vasoconstriction if you are slightly off dose so they scare me.