When I was in grad school in England my health deteriorated pretty badly and I had a chance to suspend the degree to go get treated and then come back, but I didn't do it and ended up having to move back home when it got too bad to deal with. Ended up spending two miserable years just to finish the degree marginally faster
If I went back I'd have suspended, got treatment earlier, then come back. Probably wouldn't have changed my life much though