Dear Concered, welcome to HW but sorry you have to be here. It would be helpful to know your husband's pre-brachy PSA. Nevertheless, I think the PSA trend here is worrisome. Three increases in a row usually indicated biochemical recurrance of the cancer. This may or may not be the case here but this is not acting like a typical "bounce".
My advice would be that this may be beyond the expertise of your current urologist and I recommend seeing an experienced prostate oncologist who can see you through this. If you don't know one, a list is in the back of Dr. Scholz book, "Invasion of the Prostate Snatchers". Maybe this is nothing but you should be overly cautious at this point.
Age 62 (66 now), G 3 + 4 = 7, T1C, PSA 4.2, 2/16 cancerous, 27cc. Brachytherapy 12/9/08. 73 Iodine-125 seeds. Procedure went great, only minor discomfort. Everything continues to function normally as of 11/2/12. PSA: 6 mo: 1.4, 1 yr: 1.0, 2 yr: .8, 3 yr: .5, 4 yr: .2. My docs are "delighted"! My journey: