ttc at 41 almost 42

Terri
I'm having the hardest time. Doc says I'm
Good. And may need clomid. But I'm trying to have one more. My youngest is 11. This is the love of my life. We have one son together and I would love another baby with him. Been trying for months and we always have been the super fertile type and nothing. My periods have gone all over the board the last couple years and not so regular. Provera did nothing. Didn't restart my clock. I used the be able to stop a watch by my cycles. Now I'm lucky if it's have one every 3-4 months. But my dr said I was not anywhere close to menopause. Anyone else having these issues?? Seem so lost about it.