This sounds like you have a situation that needs professional treatment.
Severe anxiety is nothing to brush off. Having a SO there is helpful, but at some point you need to seek professional help. I think you are at that point. Do not delay in talking to a counselor face to face. Internet forums and chat rooms are not a substitute for help from a licensed counselor. Any of us will say what our personal experience is, which may or may not apply to your situation.
Again, make an appointment with a professional counselor licensed in your location.