No period for 7 weeks and 2 days,WHY?!?

Last time I had unprotected sex was Jan, got my last periods in Feb and March. Those periods lasted for 4 days but that is typical of me. My eating habits are pretty consisent. I gained maybe 5 pounds and IDK why buy I haven't been as active. Over 2 months, I have been breaking out regularly, although right now my skin is pretty clear except for a few pimples on the left side of my temple area.

I have been more stressed than usual from life situations but IDK if that's the culprit as I have been more stressed than this. My mom said when I was younger, like 14, I had my period every 2 months. But I have been having my periods for more than 8 years now. From Jan to March, my period came about every 29-31 days.

I am still young so I don't think it's early menopause and no one in my family has ever had early menopause.

The thing that makes me worried is my mom's best friend sincerely believes I am pregnant. She said I gained weight and my face is even more beautiful.
And today while I told a co-worker, she said it's possible I could be preggo even though I did have two periods previously. But I don't feel pregnant...my stomach looks the same...I feel Ok.

I do have a doc app. on Monday but for now, I want an idea of what it could be??????!!!