Needing some advice please

I am needing some advice. I've been TTC for 3 years. I miscarried August 2015. Then this August I had to have a cyst and ovary removed. My doctor said I should be able to get pregnant right away since they put some dye into my remaining ovary and tube to make sure it's functioning properly. I track when I ovulate and have sex at least every other day if not more during that time. I'm 33 years old with a 10 year old daughter. I want to have at least one more child before I'm 35. Does anyone have any ideas on what I'm doing wrong?? Or what I can do differently to get pregnant?? I'm really starting to give up on the idea. I hope some ladies have had a similar situation to give me some pointers. I would really appreciate it so much. Thank you.