Hi hollyhalo,
I have had great success with creams. I find them easy to administer and monitor. My doctor says that one should use whatever works out best for the individual person.
It could be that your levels are fluctuating. When someone is going thru menopause the levels aren't going to necessarily stay the same as the ovaries may still be emitting hormones, just in reduced amounts.
My doctor thinks that the blood test is a better indicator of what is going on. It may be that you need to do several tests over a period of time to see what the ovaries are doing.
I had some liver issues, so my doctor has me taking milk thistle. I have been taking it for about 3 years now. Ever since than my liver enzymes are really good. You may want to ask your doctor about the milk thistle.