Will it ever happen

I am 35, I had my first child when I was 20, we have been trying for baby number 2 since my first child turned 2, she is now 15, We gave up for awhile and said if it happens it happens if it doesn’t, it doesn’t, but deep down each month i hopes I would get pregnant, but I also never kept up with my periods, ovulation or anything like that, because I got pregnant with my daughter the first month of trying, for the past 6 months we have been actively trying I have been taking ovulation tests temping and kept up with everything, so far still nothing. My period is due in 4 days, I have been feeling crampy down low, so my guess is it didn’t work again this month. All I want is another baby.