Lost in Texas

It's been one year and two months since my mom and sister were killed in a car accident on their way home from visiting me and my family. My sister was my only sibling and the three of us were so close. I've been told numerous times since the accident that our bond between mother and daughters was rare. My life will never be the same. I've struggled through the first year and there were several days that it was all I could do to get out of bed. The only thing that kept me going was knowing I had to be there for my husband and children. Everyone kept saying "you just have to get through the first year" and that things would begin to get "better". However, for me, it has gotten worse these last two months. I feel like I've had a major setback. Is this normal? I honestly don't know what to do!