Nothing's working...

I've tried CBT, psychotherapy, routines and meds are too little(can't increase their dose) with Ritalin 10 mg a day their isn't a bit of improvement and my focus is still batshit. I've got a shit ton of work. I can't increase my med dosage since I'm on SSRI for OCD and ADHD. I've just gotten diagnosed at 15(my parents knew I had it 5 years back) and if I don't effectively manage my ADHD for the first time ever, entering college as an international is gonna be impossible for me. Executive Dysfunction is at it's peak, I'm bed rotting like a degenerate and What do I do? Anything?