I had a c-section, but not a tubal, and my first period came at 6 months post -baby. That period was completely normal, light towards the end, etc. However, the period after that I about died! I ended up bleeding through at work, that wasn't pretty, and I hurt so bad. I think I have had a period like that one other time, and that was in middle school. My periods since have been pretty normal but the cramping is unlike I have ever had. I haven't had cramps in years. I think I would call the doc and just let them know how bad it is. They would be the best to tell you if you shoudl be seen or not. Make sure you are taking your vitamins, too.