Because your blood and urine looked fine, you don't have pre-e. You may have PIH, but not pre-e, because you would need to have protein in the urine for that to be so.
So whether or not you have PIH? I'm not a doctor, but I don't think so. I monitor my blood pressure several times a day (and I am not pregnant, I do it as kind of a obsessive thing) and it will never be exactly the same. I mentioned this to both my doctor and cardiologist, and they both said that blood pressure changes by as much as 40% during a day, depending on time of day, kinds of food eaten, activity level, stres and anxiety, etc. Your body is a living, changing thing, and just like your heart rate and blood sugar will change, so will blood pressure. The changes that you mention sound normal. Being in the 80s/90s diastolic at this point in your pregnancy shouldn't cause a problem.
But if you freak out about it, your blood pressure will go up. I took my blood pressure the other day and it was 113/71. Then, after watching a scary show, it was 150/85. Then it went back down. Your blood pressure will change throughout the day.
Here are some things you can do. Cut out excess salt and soda (diet soda will raise blood pressure). Rest and relax, watch inspiring and happy movies, call a friend. I know how hard bedrest is, I remember going on bedrest around the same time that you are on it. It really sucks. There is sooo much time and it feels like each day is an eternity. hang in there, and if you notice a trend in BP going too high all the time, go back to LD and have them run some more numbers.
Mommy to Sailor Ann, born on February 17th 2011 at 36 weeks by c-section due to PIH that slowly turned into preeclampsia.