First, regarding funding, read this:
Medicare Payments for Graduate Medical Education: What Every Medical Student, Resident, and Advisor Needs to Know You'll see since you started training in EM, your IRP will be 3 years. After that you get 50% DME and 100% IME. As mentioned above, this is usually not a deal breaker for bigger programs.
I do believe it's too late for this year. But you still can switch to Anesthesia, and I think Rads isn't impossible either. You should pick one and not try to do both. From the way you're talking here, Anesthesia seems the right choice.
You need anesthesia experience. I assume your ED program offers some elective time? You need to do Anesthesia electives. Talk to your PD, find out if anything can be done to get you that between now and June, The more, the better. As mentioned, speak to the Anesthesia PD (if your institution has a program). You'll need to sort out whether the EM PGY-1 counts for a PGY-1 in anesthesia -- although many anesthesia programs are now Categorical and include a PGY-1 experience anyway. The PD might be able to alert you to any openings at other programs.
You'll need to decide what you want to do with next year. You could complete your EM PGY-2 while applying for new programs. This gives you the possibility of completing EM training if you were to not match to anesthesia. But, it also uses one more year of your full funding, and if you truly hate EM may not be a good choice. Otherwise, you resign at the end of the year and just find a job for next year -- could be anesthesia research, but could be anything honestly. Is better if the position is somehow anesthesia related.
All of this assumes you don't need a visa, which would make everything very messy.