Any advise on what could be happening.

My youngest child is 2 in a few weeks and still feeding frequently.

My last three cycles have been 36 days, 33 days, 28 days. They have been slowly getting shorter over the last 15 months since my period returned.

My periods seemed heavy but of a normal length but my last cycle was long (just over a week) but not very heavy.

Now, I am at day 33, no sign of my period, my cervix is high, hard and turned to the back and very sore. I have some great pains in my cervix in particular when I have wind/bowel movements. And I feel nauseous, my husband put on some incense and I almost vomited.

What do you think?