Hope you are doing well today
There are several factors that make a difference in how quickly someone gets "over" lyme. I say that in quotes b/c many say that once you have the bacteria it is may always be in your system.
Anyway...the sooner it is treated the faster someone will get well.
It also depends on the strain of lyme that you get...there are a whole bunch of different strains, some are way worse than others. I contracted lyme in virginia and didn't get diagnosed for 5 years. I think mine must be a pretty bad strain b/c it devastated my body in those 5 years. Whereas, my little brother got lyme in texas and ws diagnosed at about 2 years after the bite...He was treated with abx for less than a year and his lyme symptoms are all gone! He has resumed a normal life, but I am still struggling with adrenal failure and many lyme symptoms.
So this is just my family experience with how different strains makes a big difference in lyme affects.
Rocephin is just another antibiotic...Your cousin probably responded so well b/c she got diagnosed early and didn't get a bad strain of lyme.
30 years of lyme is going to take time to treat b/c it is all over your body. Also if your replacement of steroids for the adrenals are not optimal then you could continue to feel like cr*p even when the lyme is actually getting better.
Your situation and your cousin's are totally different! Just like mine and my little brothers' situations were different. Don't let anyone tell you that you "Should" be better than you are or that you "Should" be like someone else...each persons' illness is unique and requires unique treatment!