i'am missing my peroid. however it's not accurate all the time. but i am worry too. under ribcage is swollen. i can still feel it like something beating. just like heart beat. i feel the stomach is heavier than usual. and i may feel something when i lie face down. could it be possible to have fertilization while there is no sex. could it be possible if i accidentally contact with the sperm? i am so worry. pls help me.