I had protected sex on 1 oct but I think the condom was expired anyhow then I had excess vaginal discharge, fatigue in the morning and one day had back pain. Then I took a pregnancy kit test which came neg. Few days back I had bloating for 2 days. My period is due from last three days but from last two days im experiencing back pain like I have during periods but there's no blood or discharge. Today I got another kit test it was neg, I am feeling like im on my period but its not there. Whats happening? Mycervix is medium height, firm but smooth to touch and partially open but tilted.