Quick question??

I am currently late for my period i was due to have one 2/21 but i had the flu on 2/3 could it have caused a missed cycle? My cycle is normally 29-35 days so im not sure when i would have ovulated, i tested on sunday 3/2 and it was negative but still no period. My current symptoms are breast pain, uterine twinges and lower back pain

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