Serotonin syndrome is somewhat of a phobia more than a rational fear with modern medications.

Unless you're taking a MAOi, which I somewhat doubt (as they're not really used anymore due ti safety concerns and whatnot), you should be alright.

Serotonin syndrome is still sort of in the recreational drug users mythos, because being too careful isn't really harmful, and people don't really understand neuropharmacology that much, so they tend "not to risk it."

https://www.vice.com/en/article/everything-you-need-to-know-about-mixing-mdma-and-antidepressants-safe-sesh/

(MDMA and LSD are both serotonergic, but MDMA is more risky in terms of serotonin syndrome than LSD.)

I'm not suggesting anyone on medications reads this and thinks I'm saying it's a risk-free thing, but since we be adopted SSRI instead of MAOi, it's not nearly as big of a risk. MAOi and psychedelics was honestly very risky.

SSRI's tend just to blunt the effects of psychedelics/mdma. If you keep to normal recreational doses, it should be fine. From the article:

Again, the real danger lies in what both Charlotte and Nilu describe as a chase to catch up with their friends who aren’t on antidepressants.

“You won’t be getting the euphoric, psychological effects you want by taking more, but you will be getting more of the physiological effects – higher blood pressure, higher heart rate and higher temperature, which is a bummer,” says Dr Sessa. “These are not normally dangerous. MDMA is a relatively safe drug. We know that because so many people take it and come to no harm. But in excessive doses, because you’re trying to overcome the effect of being on the SSRIs, these may become dangerous.”

So no need to be that worried about the side effects, but also while you're on SSRI, the experience probably will be a bit muted and you might have some slight discomfort. Who knows, it's a bit personal and depends on your meds. If you're just on a rather low dose of SSRI, it might not really affect the trip at all.

Not trying to advice, just informing a bit as I'm pretty well versed on the subject even if I do say so myself.