I was just tested for the same types of things as well. Nine months after having my baby, because I needed to be sure if I had or was at risk for blood clots. I tested negative for all the major clotting problems but came up positive with the MTHFR mutation. Apparently you have two pairs of the gene and if you have a mutation, mine is mutated on both pairs, then you can be at risk for blood clots. Please look it up as I am going on memory for the details. But if you have the mutation then your body doesn't break down folic acid like it should. This will in turn raise your homocysteine levels. All of this can increase your risk for clots which also leads to strokes. So..... My doctor has me taking Deplin, which contains the already broken down form of folic acid. And because I am taking a birth control pill, which itself increases your chance of clots, I am taking a baby aspirin a day as a blood thinner.
I wouldn't worry too much. It seems they are just being cautious. It was kind of a bummer to know that at thirty I already had pills I know have to take daily for the rest of my life. But if it's something I can do to prevent worse things later on, I'm ok with it.
Best wishes to you and congrats on the new little one arriving soon.