I have to provide estimate of a story, to the point where I have to tell how much I will be spending for each sub-story.. although I have given them those with buffer since I am new, I notice a pattern with me which is that I usually need some help which I get either at the end of the day or the next day. This can influence the estimate ofcourse but for some reason my manager wants a very aggresive dates, and it's challenging for me.
In addition to that, I am not sure what I will say in order to justify if I can't meet the deadline. This process has sucked the life out of the work for me. I remember giving estimates in my past companies but they were just estimates, and when I shared my side of the story people usually understood my challenges this is not happening here..