Pea size lump on cesarean scar

I have a little lump right on my scar and it is tender to the touch. Anyone else experience this? I'm such a worry wart I'm nervous that it might be my incision ripping from the inside which could cause my to internally bleed to death.. Yes I know I'm crazy but I have these worries! My youngest baby is 11 months and my oldest is 3 1/2 years.