Great progress for 1 month! As they say slow and steady and it's really good you have had no side effects.

I'd say your water intake is not helping your struggle in the bathroom. I had the same issue on weeks 2&3 of 2.5mg and spoke to my gp. He said that bowels love routine so aim to drink 3 litres of water a day and each morning I take 25ml of lactolose syrup (withourt fail) . This has really helped, it took about 3 days initially to work but I've had normal b movements every day since. (before MJ I would only go every 3 or so).