I don't poop enough?

lo
The only time I ever poop is when I'm on my cycle & it's only once or twice out of those 5 days. Since I've been pregnant (currently 26wks) I only poop 1-3 times a month. I was telling this to my family members because I get tired of the nurses asking me about my last bowel movement & they told me you're supposed to poop twice a day. Is that true?! Is something wrong with my body? The nurses even give me 2 stool softeners a day & it doesn't help. Should I be worried?