Well that was probably a glimpse into what you will feel like on your good days. My best friend takes lexapro and she can feel a difference within a week with full benefits at 4-6 weeks. Sounds like yesterday was a sign that its going to help you :-)

Try to find something funny enough to make you laugh, sometimes its impossible butif you can find something to even just make u giggle a little it will help. Laughter is a natural mood raising tool.