I’ve responded to kraftpudding above with two resources, which were rather valuable for my therapeutic trips, if you look above this comment string. Hope this helps!

Also it should go without saying that you should always test substances, if you’re unable to professionally (in the UK Wedinos is a free testing service with anonymity) Ehrlich Reagents are very cheap online and allow you to quickly test a corner of a tab at home.
There are a LOT of substances with hallucinogenic effect, which can be mistaken by many for LSD however with a different effect in most cases, or more risk in others. AL-LAD, ETH-LAD, DOB/DOM, etc.

Happy tripping and be safe, remember that each journey is different for everyone but there are definitely things you can do to make the experience a good one, or even great.