Freaking out!

Just found out my husband has Super low sperm count (300,000 when it should be at least 15-20 million), motility was a little low (33% when it should be 40%), and they couldn't even test morphology b/c they didn't have enough concentration to test :(
He's going to a Urologist this week.  My doctor was planning to start me on Letrozole but now they might wait on it as it may not make a difference.  
I'm also 220lbs and 5ft tall, so I'm nervous as I'm sure my weight also makes this harder. 
I'm thinking my only options will be IUI or IVF.  
I'm pretty new to all this.  I would appreciate any reliable websites anyone uses for medical info on this stuff or any stories/info/advice on IUI and IVF or any other options that may be out there.
I also heard about a male fertility supplement to help with sperm count.  Are these safe? Any thoughts?
I will of course also ask my doctor these questions, I just like to get other research and opinions as well if possible.
Thank you Glow !