For 13 yrs my tubes have been tied and 5 yrs ago I had a ablation.2 yrs ago my cycle came back and have been regular.For the past 2 months I haven't had a cycle and the past month I have been having symptoms.Is there a chance that I could be expecting?

After 13 years, most likely no. The incidence of pregnancy after a tubal ligation is highest during the first year following the procedure.