It is hard to say, not knowing your usual BM frequency. For me 7 day backlog happened only after my appendicitis surgery, and I don't remember being uncomfortable at that time. Possibly your system knows what's right. But if this is unusual for you as well, maybe some laxative help will be a good idea in a day or two. There are many to choose from. Like Senna for example. Or magnesium citrate or chloride. Or as you stated - salt water.