Just an update on my sciatica nerve pain, I am still having some serious trouble walking because my…

Just an update on my sciatica nerve pain, I am still having some serious trouble walking because my left leg can't hold any weight at all, everytime I try it shoots a very sharp pain down my back, into my butt cheek, and down the back of my leg. It instantly makes me fall down. The pain is starting to make me feel a bit nauseous, but I honestly think its bc I'm worrying myself to death. I don't like not being able to walk & I'm starting to fear it may be something more bc it has never been like this before and I don't recall doing anything that could have triggered it? Any one have this before? :'(