Hi Buzz bee, yes there is a blood test - in fact there are different ones. I had one done recently, as I wanted a bit more of an insight into or knowledge about where I currently am. The test results came back very quickly. I didn't get the stats /numbers, as I wouldn't have known what they meant, but the nurse explained to me instead what my hormone levels are.
I'm glad I had it done, as it gives you some certainty about where you stand and, as a result, you can then take some action if you feel it is appropriate or at least get some advice first on what action to take.

I'd also advise you to speak to your GP.

I hope this helps. Good luck!