Yes it’s an ovulation test. I have ordered some frer and will do a test when they come
I'm assuming the Clear Blue test you took was an ovulation test? On occasion you can get a positive ovulation test when you are pregnant. I'd take a pregnancy test to see what that turns up to be.
Have you also consulted the doctor about your periods being three months apart? If not, you should go ahead and seek a doctors care to see what is going on there.
That's odd, and of course a period every three months is too. You aren't complaining of any early pregnancy signs, but if it helps you could run a home pregnancy test just to make sure. I wonder if temperature charting would help you figure out when you ovulate, or tracking something like cervical position.