Depression

I am suffering with depression. I have been suffering with it for a while. I was IVC-ed at my local hospital a while back for depression. I have been maintaining it but its starting to get worse. My hormones and mood swings are all over the place. I dont know what to do. It effects my sleep and eating habits. I'm constantly losing weight. I cry a lot. I'm going to back to therapy next Thursday but I don't know if I can hold off until then. I need advice. I'm 3 months pregnant and scared.