What Causes Delayed Period And Fluttering In Lower Abdomen While Having Pcod?

hello sir/madam,

i am 27 years old female, married over 3 years and no children yet. i have pcod and hormone imbalance.i took overall 3 months cycle to regularise the period and did not get my menses the 4th month. preg test after some 12-13 days showed negative. its been 3 months that i missed periods. now, for the past 2 weeks, i've beeb experiencing short involuntary quivers or flutters in my lower abdomen, in the line below my belly button, with no pain which keeps me worried. what could that be.. please guide. thank you