Yeah, it's a bit too soon to change your mind. You should keep up with the healthy lifestyle you posted about.
I use to get weird looks too because I work and out and run for miles, yet I smoke cigs like a chimney. I'll go to the gym once a week and get a lot of work in, then I'll go right out and have a cig.
All sorts of smart people do dumb things. But I'm not saying I'm smart, so yeah. It's the only bad habit I've never been able to break even once.
What BlueBull says is extremely important. Test kits allow you to identify what you're taking, so at least if something really bad happens the doctor will know what you took, and therefore how to help you. And of course, so you know what you have is legit. There are cases of mild serotonin syndrome possible, but for your case it doesn't sound as bad as that either. However, you are risking your health even more so than the last time, if you decide to take the substances you mentioned so soon. If an mdma binge like that wrecked you, then you might get wrecked even worse if you don't allow your body to heal properly. At least a month or two (or three?) is generally recommended among harm reductionists.
Personally, I've done worse idiotic abuse of mdma a while back. But that doesn't mean I'm going to tell people it's okay to do that. I'm just lucky to have gotten through it with almost no ill effects, most likely due to being able to combat depression easily, and keep up the few good habits that I had. Which is what you posted; stay physically healthy as much as you can.
Think positive too. You can always save your stuff and take it next time.