It appears that the Statute of Limitations for Texas is 2 years. Information can be found on this site: http://www.texasinjurylaw.com/medical_malpractice.htm. I would still speak to an attorney in your area to see if your case is still viable.
Hope this helps.
/s Donald Kudler
A health care liability claim must be commenced within two years from the occurrence of the breach or tort or from the completion of treatment or hospitalization. Only if the actual date of the tort cannot be ascertained should time be measured from the last date of a course of treatment. This statute, rather than the statute of limitations for wrongful death, applies in health care liability claims for death. Time may begin to run before an injury is discovered. However, the courts have held that in certain cases (not including death cases), application of the statute is unconstitutional if it would bar a claim before the claimant has a reasonable opportunity to discover the wrong and bring suit. For cases filed on or after September 1, 2003, a new statute of repose bars any claim filed more than ten years after the act or omission giving rise to the claim.