you can do it but.... not recommended. the flushes are a big deal and the liver needs time to heal inbetween. many people find that 2-3 weeks is even too often, and they do it monthly.
everyone is different, so there's no saying what's right for you. but i've never read an account of anyone that has had huge upturns of health by continuously flushing every week. flushing 2 weeks in a row, once in a while might be ok, if there's a stuck stone, or if there'sa pervading feeling after a flush that you didn't get everything out ... but i wouldn't make a habit of it (my personal opinion).