Am I a horrible person?

In 2013 my son was still born. This past May I had a miscarriage at 8 weeks. Ok so here's the deal when I lost my son I went crazy for two years. Didn't get out of bed for months then went wild partying doing drugs a lot of things I regret. When I miscarried a few months ago I only cried for a week. I just didn't take it as hard. I was talking to my sister who asked how I was coping and she basicly said I was a monster who shouldn't have kids. Her reasoning is I must not be able to love any other babies as much as my first.