when I was a collegian I went through the same feelings of "why am I doing this again?" I had a horrible experience with my ex chapter advisor and was left in a terrible spot between a rock and a hard place - I'll PM with the story if you want but basically it came down to either I had to take alum status or I would be kicked out. I of course took Alum since I love Alpha Gam and the last thing I would ever do is betray who I am.
I hated AGD for what they did to me and I hated them (my advisors and some of my own sisters!) for how they treated me. I was bitter and heartbroken for a long time.
Then one day by chance I ran into an AGD - never got her name, never got her chapter, but listening to her story just made me realize how immature I had been through the whole ordeal. It took me getting out and away from the drama to understand why I pledged in the first place. It also took TIME - since the drama, I've gotten married and had a baby boy - trust me, that in itself will change your view. After I met that Alpha Gam - everything I felt as a new pledge came back to me with a renewed sense of loyalty.
I'm now more active than I have ever been and all it took was a chance meeting to open my eyes. I'm still sore at how my active career ended but I still wouldn't change anything for the world. Everyone is right - you can have overload and what you are feeling is completely normal!
take a break, take some time and rediscover your sisters
good luck