brandon, aloha
mtx is a weak dose of a very old and quite toxic chemo therapy drug...it makes people feel like crap in general and all that other bad stuff you might have encountered in experience with chemo meds...
look, bubba, it takes months for this stuff to work on your AS if it does so at all...your doctor will continue to increase dosage cause 7.5 ain't enough to do more than make your stomach churn etc. this is not a HOT, very effective med at all under even the best of circumstances.
friends don't let friends take mtx.