vaginapagina | Sex and the menstrual cycle (Reply)

I couldn't find this question in the archives, so here goes...

My boyfriend and I have not had sex for about a month and a half and my period had been about 2 weeks overdue. We just had sex last night and this morning my period finally came.

This happened to me once before too but at that time, my period was only a few days overdue when we had sex and I had my period the next morning, so I didn't think much about it.

But this is the second time and I'm freaking out thinking whether from now on the only way for my period to start, when it's late, would be me having sex the night before :(

My questions:

1) what's happening to my body - hormonally - that I need to have sex to get my period? I am not on any medication.

2) I masturbated twice in the past week, but it did not help me get my period, why is this so?

Also, just a side question - I noticed I've been shedding a frightening amount of hair (about 300 strands of hair a day) when my period is overdue. This morning when my period started, I immediately went back to shedding almost no hairs.

I just think I must be really hormonally messed up. I hope some of you girlies can help shed light on my situation.

Thank you so much