M.C.
I would not get too upset until you actually get a full diagnosis. I hope for your sake it is not IC. I have had Chronic Urethritis since the 80's. This is a disease that is not fun to have. But, you might not have it. There are many reasons for blood in the urine.
As to taking Aloe vera pills, they can't hurt, and might help the healing.
There are many websites for bladder problems. One site is the ICN.com site. And the ICA site. These give a lot of information to you. They also have Forums from people who have the problems.
I hope your doctor intends to follow through with other types of testing, or sending you to a good Urologist..
It depends on the type of person you are. If you over react to things, then I would not check out the IC sites yet. They will just scare you.
Esp, if you do not have this problem.
If you are the type of person who wants as much info and wants to be proactive, then check them out, and demand your doctor do more than just the Aloe Vera.
Good luck.