Greetings @phoenix_dawn!
I personally believe you can tell how a spell went by how you feel immediately afterwards- and it sounds like you had some very positive signs of success, congrats! 
The heavy and tired feelings afterwards sound a lot like Spellwork Burnout. Christina and Amethyst offered some great advice, and I think the post Christina was talking about is this one here:
There’s some great advice there for how to deal with post spellwork exhuastion. I also recommend following up with some self-care work (aka- pamper yourself! 
) like the Self-Love Break Spell. Also a nice bath or shower with some herbal soap or bath salts goes a long way 
Everyone finds their own favorite ways to unwind or refresh after spellwork- I’m sure you’ll find things that work for you!
Good luck and blessed be! 