Am I too old?

Hi. Never posted here before.  I am 43.  Married.  Nice home.  Both employed.  We have two boys - 13 and 7.  I have had an itch for a 3rd baby for the better part of four years 😥.  We started later with family planning (30 with our first, 36 on second). We never really made the decision to take the plunge for #3.  I still regularly get my period and regularly ovulate.  I know there is greater risk with having a child at my age.  
Any thoughts/advice on a baby at this age?  Should I hang up this desire for good? If so, how do you move forward? I tell my friends I feel like I will take this regret to my grave.  It's just that strong ... But not very smart??  Thanks for any thoughts.