I'm 16 and I missed my periods for the first time last month ,I had sexual foreplay several times.. and I was full covered up with dress and certainly he was too... And as if now I missed my periods for the first time I'm just worrying too much... Is this normal.. am I just being paranoid..
Please help me...

Do you know how pregnancy happens? You have to have physical contact with the genitals with no clothes in between.

So, it appears from reading your question that you are just being paranoid.

Unless and until you are prepared to be an unwed mother, it would be wise for you to refrain from sexual activity.

I would also suggest that you learn how your body "works" - Female Reproductive System: Organs, Function, and More (http://www.webmd.com/sex-relationships/guide/your-guide-female-reproductive-system)

I don't know where you live, what the age of consent is where you live, how old your boyfriend is - but he COULD get in trouble as a sexual predator.

Not sure how you have sexual foreplay with your clothes on either, That is just sexual touching.

I would have hoped a 16 year old would know more about pregnancy. But yes before any more sexual contact, please do a lot of study