Your numbers dropping, and not having to visit the loo so often at night is a good thing.. It means that your overall sugar levels are decreasing and the body is stopping it's needs to try and dispose of excess sugar via urine...
What to do next, well you need to find out what sorts of foods are making your sugar levels rise... One of the best ways of doing this is to look at the carb content of the foods you are eating and work out how many carbs you are comsuming... You then need to look at which types of carbs are posing the biggest problems...
Some of the probmatic food sources for raising BG
Pasta, pastry, potatoes, bread, rice, some root vegatables and some fruits...
these do effect diabetics in different ways... Some will have more of a problem with one than another one..
When you managed to identify which carbs are given more problems, then you need to look at what you want to do about it.... You could leave them out and subitute with a lower carb, or sometimes just having a smaller portion of that particular carb might do the trick...
You also need to concider what time of day you are eating certain types of carbs, it could be to eat toast (bread) in the morning or dinner time, you get a surge of a BG raise, but if you have it at tea time then the effect is a lot less...
Bit of a trial and error in finding out, and remembering to jot everything down, which do try to include whether you exercised, felt off, or had the sniffles that day... the better the montioring picture you can build, the easier and clearer whats causing what, and how you may tackle it becomes a lot easier...