I suspect the other hormone in the ratio was LH. There are a few conditions that can cause the balance to be off.
Most notably, Polycystic Ovarian Syndrome. However, in this condition, the LH is higher than the FSH, rather than an elevation in FSH as in your case.
When the FSH to LH ratio causes an increased FSH level it is an indication that the ovaries are struggling to produce enough estrogen. Often, an FSH:LH ratio of greater than 2.5 is an indication of possible ovarian trouble.
This may be why your gynecologist as suggested that you may have trouble getting pregnant. One of the causes of an elevated FSH is decreased production of eggs (through a complex mechanism). This is by no means a guarantee, however, and there are treatments that may be able to augment fertility if needed.
Your gynecologist may be able to do more testing to find the cause of your FSH elevation.
Advice and opinions given are based on the information provided and must not be considered an official medical recommendation. The limitations of the internet prevent an appropriate evaluation. Always consult your doctor if there is concern.