confusedd???

i stopped the mini pill end of febuary has withdrawl bleed 2 days later then had a proper period on the 31st march its now 2nd of may and nothing yet accordimg to ovia and my other apps af was due the 28th so i would be four days late although this app says im not due on till this week im sure i had ovulation pain on the 17th but no bfp all bfn so confused