On an average, your luteal phase has to be at least 12 to 14 days to be able to eliminate luteal phase defect. Anything lower than that you might have luteal phase defect or like you said, you never ovulated at all. Do you have distinct signs when you ovulate like ewcm, aching on either sides, bbt increase for 3 days min, opk positive? However, some fertility specialists do not really believe in opk or bbt as it may only be indicative. End of day, still much easier to do vaginal scan to see the size of your follicle and whether your follicle pops out and becomes corpeus luteum but for us patients, it can be really expensive to do that constantly.
If you have low progesterone which can be linked to spotting before AF, it could mean that your uterine lining is not thick enough, your progesterone level (HCG) is too low to support pregnancy. In such cases, gynae will actually give your progesterone med or jabs to support possible pregnancy once you have ovulated.
I think the tests gynae will usually ask you to do would be to test on your lh, fsh,progesterone, estrogen. Not sure if the gynae will ask you to test your prolactin level too. Basically, gynae and fertility specialist have different basis for tests so it probably depends on who you go to as well. Like for eg, gynae will ask your hb to do SA and it could be just to see motility, morphology, quantity etc. But fertility specialist may go deeper into details to see how accurate the sperm can swim instead of just see the motility level.