I know this is prolly a overplayed question but I can't find nothing.

I am totally stressin. Oct 1st I was the second day into my period. I can't recall when I was over I usually have a 5 day cycle.

I was helping my ex out on the 12th of oct. We did not have sex, he put it inside me for maybe 5 seconds and pullled out and finished himself.

Now a bit of backround here, we were together 3 years and had unprotected sex everytime. Never once got pregnant

however, I am a few weeks late, I took a hpt on 15th of nov and it came back negative. I took another on the 22nd and it too came back negative.

I have no symptoms, I have been stressed out about things last month hardcore. Aswell I bought myself a bike on the first of oct (how I remembered I was on my period) and have been biking a mile or so each day. I haven't biked in years.

Could the fact I started to exersise and under a large amount of stress cause me to skip a period this month? I haven't been regular since I started my period.

Is it just my imagination?

Thanks