Initially, the plant thrived and developed new growth, rich green leaves, and blossomed twice in the first three months I was here. It was hot and I had to water the plant every couple of days because the soil would dry out quickly. I kept the plant in the sunniest spot in my apartment, outside on a west facing balcony with a small awning. Initially I was concerned about not having enough direct light (its shaded until about 1pm) but the plant seemed to do well so I didn't fret.
But then the Jasmine starting turning yellow. Now the plant looks so ill I fear for it's survival. The leaves are small and yellowish and some of the tips have turned brown. At first I thought the plant was possibly going dormant, but it has been three+ months and it continues to deteriorate. I even tried coaxing with some dilute fertilizer two months ago but that failed to stop it's deterioration. There are no bugs that I can currently see (although I have seen some what I think were springtails after watering in the past).
My first thought was that I was over-watering the plant so I cut back--waaay back (as the soil retains moisture more than it did in the summer and I have even gone a couple weeks without watering). but that does not seem to help either.

Any advice you can impart would be greatly appreciated. I'll include some pics. Thank you.