First of all, I wanted to say welcome to JM and to TTC 6 Months +!!!
You have come to the right place for comfort and support. (((hugs)))
Yes, TTC for an extended period of time can be very stressful. Everyone will tell you to "just relax it will happen"...Ummm...HELLO, relaxing doesn't make babies!!

But I do know that stressing too much is bad for you in general and therefore can have a negative impact on TTC.
It sounds like you are taking the necessary steps to find out what is going on. That is good that they are not worried about the fibroids. If your spotting this cycle isn't normal and AF is late, then I would test - you never know!! It is best to find out what the problem is so that you can work on fixing it. I hope the SA comes out ok, but if not, at least you know what the issue is and there are lots of things that they can do to help.
Now - I must give this advice - do NOT go internet research overboard - you will drive yourself crazy. I understand the need to research, but only go to medically backed sites like WebMD, Mayo Clinic, etc. There are plenty of sites out there with false information, so its best to go with authentic sites.
Feel free to vent or ask as many questions as you want - the ladies here are awesome!!