Diva,
I am sorry to hear that you are down but we all have our days when we feel depressed. Don't worry that you are getting depressed, especially if you are PMSing. For me, personally, every month around that time I get very tired, very anxious, and down (i cry at commercials or thoughts or anything LOL). You are just reading into your sadness too much and who wouldn't be a little sad to know that the meds that are the best can't be taken because of allergies. You have to accept that being sad some days is ok and it doesn't mean you are on the path to being clinically depressed. Even those people who don't suffer from depression get down and get the blues. I can totally understand why you would be concerned since you have been depressed before and that can be hard. Just stay positive, be hopeful, and things will always work out in the end. Allow yourself some days to just be down. I like watching Lifetime movies on days like that so I just stay in my pj's, snuggle under the covers, and watch movies. It actually makes the day better for me and I don't sit around and obsess because the movies take my mind off of things. Maybe this would work for you too. In any case, good luck and keep us posted. You will be fine.
~Isabella~