Hi Debra,
Sorry to hear about your concerns.
We need a diagnosis first. This will be answered by the ultra sounds and probably a CT scan with contrast if there is any question or concern after the ultrasound. These studies will determine the size of the aneurysm, if present, and then either dictate a repeat study in 3, 6, or 12 months depending on the size. If the aneurysm is of sufficient size, surgery now is also an option.
You wont know the answer to these questions until you have the study--waiting is always the hardest part.
Could it be a leaky valve?
The heart murmur certainly could be a leaky valve. If there is any concern or question over Marfans syndrome, an echocardiographic evaluation is reasonable.
Will this affect my life expectancy at all or cause future problems?
Any major vascular surgery could affect your life expectancy (mortality) or future problems (morbidity). There are risks invovled with the surgery (albeit low for someone your age) and the risk of needing future surgeries to address problems with the same graft or need for new grafts.
The answer should slowly become more clear as your doctor figures out what, if anything, is wrong.
I understand this must be incredibly stressful....fear of the things that may happen is more often worse than what actually happens. It is hard to fight human nature--we tend to worry.
I hope this helps and good luck in the upcoming months.
All my best,
Linda