Depression/Girlfriend- Ive been seeing this girl for about a year and more seriously the past 4 months.?

Sat. was to be our 4 month aniv. and to do somethign special. About 3 wks ago she went to the doc and he switched her from prozac to paxil, and it has not been good at all!! Without her warning me or me knowin she just stopped takin the prozac like the doc said then a week later half a paxil and now for a couple days a full paxil. but its been BAD, acting weird, almsot secretive, kinda avoiding me a bit and flippin out at the littlest things. Satday she decided to do laundry with her aunt inseatd of celbratin our aniv., when we were leavin she asked why i dindt look happy i said dont worry about ti cuz i didnt wanna start soemthign n she flipped so at her house i opened a beer n she flipped more so i said i cant do this i got to end this and leave and she was all for it, we still tell each toher we love each other but now she keeps sayin she cant deal with anything right now and needs time but i think the lettin her go REALLY got to her, even tho i have been telin her im here n luv her