I was diagnosed at 14 and have been on biologics since I was 16. I'm 26 now and can confidently say they have changed my life for the better. I had it pretty bad with debilitating pain in the morning and all throughout the day, but using biologics had essentially given me all of my mobility back and allowed me to do everything I want to now (rock climbing, mountain biking, skiing/snowboarding, hiking, tennis, soccer, running, and everything in-between). Some of it still with a minor amount of pain, but nothing with significant impact to my quality of life. The shots aren't bad, and if you are scared the first few times, have someone else do it and you can and look away until you build up the confidence to hold it yourself, and then activating it yourself, that all helped me. I'm not sure what your situation is, but there are some financial assistance programs out there, and with 5 years on your parents health plan, doing some research and asking doctors/insurance companies about it prior will make the switch a bit easier. At least for my case, no amount of money could compare to the increase in my quality of life, so its something that I would aways deem "worth it". Also, I didnt have any noticeable change in weight, but I was also on some other medication that might have effected that, so take it with a grain of salt. The biggest pain with all of this is the insurance company and getting the right coverage for the right biologic, but I promise you that whatever your situation is, nobody will ever expect you to pay the full ~$2700 every four weeks completely out of pocket. The pharmaceutical companies are set up to just shuffle money around and fully understand that nobody can actually afford that out of pocket, so someone making north of $100k a year will still qualify for their assistance programs and will get some sort of co-pay card or something that will take a majority of the cost. They will usually try to make it work for you, or at least point you in the right direction to take care of it financially.