I only took it for 5 weeks before I developed a severe allergic reaction to it (not that uncommon with that drug), but I understand it can take several months for it to work. Since it's been 3 months for you so far, why don't you ask your doctor when you go back in for your next visit. Your body must be tolerating it well, or you wouldn't have been able to take it as long as you have.
Best of luck to you,
Current dx: Rheumatoid Arthritis
Suspected dx: UCTD/Early Lupus
Current Meds: Enbrel, Plaquenil, Methotrexate, nexium, tramadol, nasonex,Tylenol PM
Past Meds: Relafen, Vioxx, Mobic, Voltaren, Sulfasalazine, Entocort, Prednisone, Humira, Reglan, zyrtec, zegerid, aciphex