@shakeira I hope that your new diagnosis is the key to success for you. Nick is fantastic at what he does and I hope he gets you your take home Bub.
I wasn't a fan of the lit treatments, but it is over in 15mins and is really not that bad, so you'll be fine. If you are nervous perhaps have a loved one go with you to talk to you while it's being done. It helped for me. Everything else I found much easier... I even had a nap during one of my intralipid treatments when I was tired during early pregnancy!
All the best!