Can Sciatica Be Caused Due To Vomiting Violently?

I' ve had bouts of sciatica and am having one now for the last week. Could this have been bought on by my vomiting violently bent over the toilet during a recent bout of the flu? I could feel the pull in my lower back when i was doing that. it's worse in the morning when i just get out of bed and at night when I'm still. Light jogging actually seems to bring some temporary relief, so i don't know if i should rest or move. Could the vomiting have bought on this episode of sciatica?