I didn't contribute anything to our group project and I feel horrid! Help?

About 2 weeks a go, we had a project assigned. I am in a group of four. Basically, I asked if we could meet up after school, but they couldn't do it on the days they could, so we didn't. tiếp theo thing I know, the first draft was due two days ago, and one of the group members took care of anything. I thank her, but feel a little upset since I couldn't do anything. Now I feel terrible! I asked them if perhaps I could at least take care of the introduction and conclusion and if I could do some minor twerks here and there but that's not enough. Everything I do seems to be wrong. I tried editing some part of the script for the project but that's not enough and they told me it wasn't enough.