I have a 45 year old patient contemplating this now who is leaning toward trying at least once because she wants to reassure herself that she has done everything possible to have another child (she has one already). I told her, and you should understand this too, that IVF is not a perfect technology even in young women, and like trying naturally, it can take several tries. So if you want to be absolutely sure that you tried your very best with IVF, then you need to be prepared to try several times.
As to whether or not it is worth it, that is a totally individual decision. The worthiness of something is defined by yourself.