Ok, so you think you need to start talking to your doctor about infertility testing. Way to go! It can be really hard to make it to this step. Infertility is defined as: the inability to conceive or carry a pregnancy to term after 12 months of trying to conceive. If you are over the age of 35, the time of trying to conceive is reduced to 6 months (http://www.resolve.org/infertility-overview/what-is-infertility/).
If you think you need testing, I'd see how much your OBGYN is willing to work with you. I would first ask for CD3 b/w, 7DPO b/w, and an u/s. All of these things can be done within the same cycle. CD3 b/w can typically be done on CD2-4, so if CD3 falls on a weekend, you should be able to work something out. Now with 7DPO b/w, do NOT let your OBGYN or one of the nurses confuse this with CD21 b/w. CD21 b/w is only useful if you O'd on CD14. The only way for you to CONFIRM ovulation is by charting your BBT (www.fertilityfriend.com is a great website for this). OPK's do NOT confirm ovulation and most RE's are not satisfied with only that information. Your blood work will be checking your hormone levels, thyriod, blood sugars, etc. The u/s will check for any major uterine abnormalities and the overall look of your ovaries.
If you want a SA (semen analysis) can also be done this cycle. I would make sure to do this before any more invasive tests are ordered for you as this test is SOOOO easy and relatively cheap OOP.
Ok, so those tests came back. Now, if you're still not pregnant (and if it's been a year of well timed sex), then get thee to a RE!!! Once there, they'll probably take the reigns but if not, ask for a HSG or SHG next. (have you noticed that I haven't mentioned treatments yet...yes, that was on purpose - no treatments should have been ordered yet) This will show a more in depth look of your uterus and check to see if your tubes are all clear.
If this comes back clear, then it's likely treatments will start... (see next post for more info)
The next step in testing is a LAP. This is a diagnostic surgery. It's very simple in surgery terms and most women have easy recoveries. Little cameras will be inserted through small incisions in your belly (mine went in through my belly button) and they'll look around. This is the only way to definitively diagnose endo and other issues. It will also give them a look at other organs around the uterus and inside.
Sometimes your doctor, whether new or old, might order repeats of tests. This is especially true of shady SA's. If you get bad results with those a repeat will almost always be ordered a few months down the road.
Ok, this is pretty much it in terms of basic testing.