Working on my 4th child

I suppose to start today February 13 2014 but I haven't yet I don't wanna  get my hope up but I really hope I am pregnant my husband & I have been trying since July 2013. We have 3 children but they are his step children. I got pregnant in September 2013 and had a miscarriage October 201 3 that was my first miscarriage. Now we are trying again. If I don't start tomorrow I will be test on Saturday maybe tomorrow.