Could I Be Pregnant? HELP!!

Lauren
Hey ladies I need some advice, I'm 21 and I've been with my partner for 7 years! - yes that long! - I recently came off my pill only at the beginning of this month as I was having some issues with it. I had my period after the first day of not taking my pill. Now my period is four days late, I'm feeling nausea, I'm bloated and gasy, my nipple have been a little sensitive but mostly feel heavy and uncomfortable.
What the possibility of falling pregnant the first month off the pill? Could I just be late because my period is still trying to regulate? Any advice welcome!!