Please give me words of encouragement

I met the love of my life later in life I was 34 and he 36. We had our son me aged 36 and him 38. We put off trying for a baby after a year later as we found parenting challenging at first and both went back to work. Me at 38 and him nearly 40 we tried again and had two miscarriages in the matter of 6 months. We took time to grieve and now I’m 39 soon to be 40 and he’s 41 we really wanted to try again. We have been ttc for 7 months and it’s getting me stressed as I fear we left it too late for baby no. 2 I had a transvaginal scan and everything looks normal. I’m having further blood tests and he’s arranged an appointment for testing. I really need some words of encouragement as I know AF will be here in a matter of days and I can feel the symptoms :( I’m so grateful for our son we just want to have another baby and make our son a sibling. I don’t want to miss out on this opportunity.