Trying for number 4

I really want a little girl. I lost both my daughter's and then had a son. I love my son so much. He's my everything but he's alone and I want him to have a close sibling. One ectopic last June one miscarriage last September of 2014. I'm healthy but haven't conceived since june. My fertile week was almost 2 weeks ago. I have bad pelvic pain in my lower back and hips. I feel nauseated and I'm getting on and off dizzy spells. I'm hoping I'm pregnant. Period due on Saturday. My fingers are crossed. Not testing unless my period is late. Just need some support and baby dust. Thanx