I gave birth on Dec 21 had tubal on Jan 31, I still have not had a period. I am in a lot of pain body wise, (like the flu) and exhausted all the time. I also have menstral cramps a lot but in the morning mainly. I took a pregnancy test with negative results. I do not breastfeed. What is going on?

I gave birth on Dec 21 had tubal on Jan 31, I still have not had a period. I am in alot of pain body wise, (like the flu) and exhausted all the time. I also have menstral cramps alot but in the morning mainly. I took a pregnancy test with negative results. I do not breastfeed. What is going on?
WHAT IS A TUBAL? AND Have U WENT TO THE DOCTOR?

Had my tubes tied. Not yet