Glucose test - 3 hrs

I had my 3-hr test this morning and I dreaded every second of it . It's my second one this pregnancy. I'm 27 weeks and I finished the test feeling exhausted and tired . Went to have a meal and came home and slept for 4 hours still feeling tired and weak from it all. I pray I never have to do that test again. I was miserable. They don't even let u leave the building while doing the test . I still feel the aftermath of it all.