I'm so sorry, that is a lot to go through and to top it off your husband is deploying. The only thing I can think of is maybe your levels didn't drop all the way down like thickm said. What happened? Have you gone back to see if any thing has changed??
thats sounds very strange, when i read this i thought maybe your body still had some pregnancy hormone left from your miscarriage! i heard a miscarriage can take a while for some people to get back to zero! not doubling and being so so low seems like it maybe from your miscarriage!
I've never been in this situation, but the best thing for you is to be in contact with your doctor early. The earlier you are in with them they may be able to find out why you had miscarriages and fix the problem.