I have missed my period ? Could I be pregnant? Or it is just stress ?

Can you provide a little more information? Like When was your last period? When did engage in unprotected sex during your cycle? (dates or cycle days) Did your partner cum in you?

My last period was the 8th of January and it last about a week sometimes as they are very heavy , I'm normally regular with my periods but the pill I'm on you take it for 21 days then have a 7 day break for your period ? But I usually start like to the end of the 7 day break. And he does cum in me , we use a condom and he does it in that , I always check of the condom is damaged which it wasn't. And when we do it unprotected it's only to like start tings off then when he is close he puts a condom on.

Also we have a long distance relationship so only see eachother every 2 weeks or 1 week and only for weekends we see eachother