My boyfriend noticed a few days before I was due on (never came on though, 6days late) that my vagina feels loser and wider than normal, would it be pregnancy related (if I am pregnant) or would it be something else? really need to know

First no you do not become looser, and your boyfriend is wrong and really a jerk for even saying that. Perhaps there was more lube or fluids that day, and it sounds like you have just started having sex,

He says it seems more bigger inside, I'm worried in case something is wrong with me :(

Honestly, I don't know how he is claiming to even know that.

He doesn't know what he is talking about. You MIGHT get looser after having maybe ten kids. Is he trying to accuse you of cheating on him?

Sex doesn't feel the same:/, I don't feel tight like I used to and now suddenly Ive missed my period Im getting really scared, Ive read a few articles were girls have gotten loose and their boyfriends think their cheating but they've all been pregnant:/, I wouldn't cheat on my boyfriend but I do understand why he thinks I am, we had sex and I was tight 4days later had sex and I was loose:S

Stop reading and listening to all those urban legends. You don't get loose when you are pregnant.

How long since your last period?

I finished my last period on the 31st

You also don't get loose from cheating or regular sex.

So you haven't missed a period yet.

Yea I have missed, was meant to be on, on the 22nd this month:/