hii

I have been taking lexapro for i guess about a month or maybe two.. Two, i think actually.. At first, they seemed to be working.. I mean there was definitely an improvement in mood and also in attitude and seemed to be less depressed. But now, after taking it for a while, it just doesn't seem to be working. I went to see the psychiatrist about two weeks ago, and i talked to her briefly,(after waiting in the damn waiting room for over an hour). She asked me if it was helping with the depression. I told her i thought it was working and then she gave me more samples of it. Then i think she said that she was going to see my one more time to give me more.. thats what she said .. I'm not sure if i heard wrong that shes only gonna give me more one more time, but then she also said something about staying on them for six months.. so i dont understand..
My problem is that they dont seem to be working at all anymore, but i dont even know if they ever really did, or if i was just in a good mood for a while or something.. i dont understand..
ive been feeling like crap lately, especially at work, for no reason.. sometimes very little things upset me, like if people dont say the right thing, or if the guy i like doesnt smother me with attention at all times.. i dont get whats going on.. the other day at work, i got this really bad pain in my chest/back out of nowhere and i freaked out.. i didnt say anything to anyone, and it went away after a couple minutes, but it was soo scary..

so what do i do? I dont have an appointment till july 20th i think.. she is only available once a week and she's all booked.. july is the closest appointment.. and i havent been taking the meds because ive been so sleepy lately and im also convinced that they dont work..
i'm soo lost.. and i'm beginning to hate life again..

Sooo.. any advice???

thank you.