You heard me. Wrong!
In constantly putting yourself last, you are telling yourself (and others!!) that you are not worth it. You are covertly saying that other people are always more important, and that your needs are not worthy of being taken care of first. I cannot tell you WHY, especially without ever meeting you, but I can help you to stop ALWAYS putting others before yourself.
You know, I also want to point out that sometimes it's nice to put other people first. Key word: sometimes. However, always putting others first is not healthy. Do not say, "I can't help it, that's what people expect of me." (Are you the type that always does what others expect of you?) Instead, you should say, "I CAN put myself first. I am worthy of taking care of myself. I am my own most important person."
If you think you're one of those people, but don't want to be - contact me and we can help you set goals to learn how to put yourself first. We can start small and gather steam as we roll. :)