Spider bites are
usually minor and self-limiting events, but you don't say what type of spider bit you. If it was a black widow or brown recluse spider, then you need to see a doctor, health insurance or not.
Look in the phone book for your local Poison Center or call 1-800-222-1222, and they can help you with your question.
The following web site can help you find a poison center
http://www.aapcc.org/findyour.htm