I just hate how some Dr make us feel. I had my son at 40 and the year prior, had a miscarriage. I originally had a Dr in Lewisville who essentially was going to send me to a high risk specialist without ever examining me. I'm in perfect healthy, not over weight, etc. he was just tossing me. His malpractice insurance probably couldn't handle me. I then started to look for Drs who treat pregnancy as a natural phenomena and not a disease or risk to the malpractice insurance. Sorry if I sound like I'm blasting your Dr. He may be very good and you may love him or her. Frankly, I'm surprised your Dr ordered the triple screen. basically, it's not a diagnostic test but shows your odds given a number of factors. It's kind of unique in that way. My dr told me it's always high for anyone around 39-40+ therefore she recommended, if the mom was interested, goign for the level 3 and/or amnio. She highly recommended the level 3 for older patients since there are some other risks for older moms, such as intestines not being inside the abdomon (entirely fixable btw, you just need a c-s). I went to the specialist, checked out ok, and then finished my pregnancy up with my regular ob.
Statistically, you have about a 98% chance of having a normal healthy baby at your age. Try and take some comfort in that. Those are really good odds!! The triple screen is just a number and there are a ton of false positives and false negatives.
Go for the level 3, it's fun, you'll get to see your baby. We went for this as well. If you are a nervous nelly, or like to know everything (like me), you can get the amnio. I know a lot of people will say, i'd never do anything so I wouldn't get a test. That's fine for them I suppose. I wanted to know if there was anything up in case I needed to change hospitals, or doctors or prepare for a c-section. Preparation is not a bad thing and in some cases, saves the baby's life.