Trying to conceive. What did you ladies do different the month you got pregnant? X

Hi there, I already have a daughter and been trying for baby number 2 for 9 months now. ( took us 4 years to have our daughter as had 3 miscarriages in that time with cancer) anyways my cycle is 41 days and I always get a strong positive opk on cycle day 26. Anyways I've tried different things like folic acid conceive plus multivitamin etc. I spoke to my dr and she said she wouldn't help me as I'm only 22 she told me if I haven't got pregnant by the time I'm 38 to call back personally I find that abit wrong? Anyways any advice would be amazing x