Post C-Section Pain

At 4 weeks and 6 days post c-section I started my first period. The period stopped at exactly 6 weeks post c-section. I have had NO problems yet. At 6 weeks and 1 day, my husband and I had sex; NO problems and the sex was great. Now, yesterday at 6 weeks and 4 days, my husband and I put up our Bowflex and I attempted some leg workouts to see where I was at. Trying these I felt a pushing/pulling pain IN my vagina, that feels EXACTLY like a tampon that has been inserted the wrong way (you know what I mean!).. after I stopped, no more pain. Tonight, at 6 weeks and 5 days, we tried sex again. SAME "tampon in wrong" feeling; I cried because it hurt so bad and it freaked my husband out. Anyway.. has anyone ever had this happen after a bad labor with pushing then c-section? (I was in labor from Monday at 8pm to Wednesday at 4pm. Started pushing at 4pm-8pm NONSTOP. Ended in emergency c-section and baby was born at 11:29pm.)