Hi,
First of all, crazy as this may sound, I say congratulations! Going to a specialist is a big deal. I thought it would be scary and would make me feel less hopeful. I avoided it for almost two years.
I wish I had gone sooner.
I'm sure every office is different. They will likely run bloodwork on you, and depending on the office, and the time in your cycle, perhaps a few other tests. Mine was a very LONG appointment (almost 4 hours including the tests they had me take right then and there).
Bring notes on your cycles if you have them. What day you've ovulated, (and how you know, OPKs versus temping) how long your cycles are, how long your luteal phases are, and any notes you have on cervical mucous, etc.
Some places may test you right in the office and discuss the results in the same meeting. Others may schedule testing and a follow up appointment. Either way, they'll probably talk to you both about a plan.
I suggest calling the office and asking them if they will be running tests in the office, and how long a new patient appointment usually is. This might help you manage your expectations.
I thought knowledge would be scary, but I was surprised that I found it incredibly empowering. There were things we could DO! And they weren't all scary medications I wasn't comfortable with or big procedures! You never know. There might be more you can do than you think.
And honestly, an obgyn saying it's low count/motility may be different than an RE's opinion. They often have different definitions of "normal" because they're use to working with us out here in the fray. In the world of "abnormal" he might be just fine!
My other suggestion: If you aren't comfortable with the office, or doctor... LEAVE, FIND ANOTHER!
My first office made me uncomfortable. They made me feel like MY thoughts didn't matter and I was supposed to blindly follow whatever they said. I left, did a bunch of research, talked to the ladies at the front desks of a few offices (often a good indicator of the vibe of an office in my opinion) and my next visit was incredible.
I trust them. But they also listen to ME. If I want to push for a test, or an extra ultrasound or NOT taking something, they understand that fertility care is EXTREMELY personal and support my decisions.
For me... this is huge.
But again... I completely understand how unnerving it can be to be making an appointment with an RE.
In case this is comforting at all: I had been TTC for almost two years when I started going to my specialist (the one I love). First appt was in February. It took two cycles to get my progesterone dosing correct and I was pregnant in late May.
(Unfortunately that ended in a miscarriage in early July, but that was unrelated and I'm just now getting back to trying again, and hoping it happens just as fast again with the same interventions!)
My point being that going to a specialist can be a very emotional experience, but it can also bring great hope and comfort, in knowing that you're surrounded by people that get it.
Good luck and keep us posted!