Not really.
If you are still worried at all about the effects it will have on you or about triggering a flashback to your previous bad-trip, you will either be successful in doing just that or start obsessing about it for the duration of your trip.
You need to be in a calm, rested, relaxed and open state of mind in order to have a pleasant experience with psilocybin mushrooms or LSD. Any anxiety or irritation will DEFINITELY be amplified.
Once you have attained this relaxed state, you will KNOW that you are ready.
If you still feel unsure, back away. These psychedelics work in a way that your set/setting and mood play a HUGE role in the outcome of the experience.
Example: Mushrooms while relaxed in an empty grass field with friends surrounded with trees swaying in the delicate breeze.
VS.
Mushrooms during civil war in Kuweit while you are hungry, tired and stressed.
The same dose of the same substance will produce radically different results, guaranteed.
Hope this helps.