Relax... you have entered the "Twilight Zone" that is the world of breeding reptiles.
If you are certain that you felt follicles and that both were gravid a week ago... you can be (fairly) certain that they are still gravid. To have one female reabsorb her follicles is rare, but to have two females in the same (small**) collection reabsorb their follicles is extremely rare. If it did happen I would go back and see if there was some sort of event that could have triggered this. This would most likely be some sort of drastic environmental change that both of them experienced.
-Malfunctioning thermostats or heat source
-A recent move
I worked in a factory when I was fresh out of high school and handled very high temperature plastics on a daily basis. The result is that I have poor tactile sensation in my finger tips. I am able to palpate my females, but not reliably. Until she is just about ready to burst, I don't even bother counting her follicles. It takes time and experience to be able to tell the difference between a follicle and something else that can be in this area of the body (such as gas bubbles, fecal matter, etc).
Don't be discouraged yet. If you are not completely sure that they are gravid there is nothing wrong with reintroducing the male(s) until you are certain.
Once you are certain, stick by your guns or you will drive yourself crazy second guessing yourself. Even if you turn out to be wrong about them being gravid this year, the experience will only help you be more successful next year. I've been keeping and breeding reptiles for a long time (~15 years) and not one year/season has gone by that I didn't learn something new and end up ultimately tweaking my husbandry.
**No offense was meant by calling your collection "small". I was only using it as a relative term. If you had ~100 snakes and told us that two of them reabsorbed their follicles I would not consider it to be too much of a coincidence. However, if you have only a few snakes the chances would be far less that you would have two females reabsorb their follicles if no drastic events occurred.