How do I get health insurance with pre existing conditions?

You definitely should find an agent to assess your situation.  In general, you've missed your shot for getting coverage anytime soon.  In some areas, you may be able to get a short-term medical plan but it may not cover any pre-existing conditions.  If you're income and assets are low enough, you may qualify for Medicaid - that will depend on where you live (what state).  If you qualify for Medicaid, you can jump into that right now.
Otherwise, you're looking at this fall's annual enrollment period to get coverage under the ACA.
As for disability insurance, if you're bedbound then that's just not going to be an option.  I hope you get better from whatever has stricken you.