Please someone help me . I'm worried

SO ! 

Im thinking I'm not getting pregnant because ok one day I was loving  on my honey , and I gave him oral sex, an when he Reached his peek not very much came out ! I mean it wasn't little little but I was married in the passed and my ex would cum sooo much . Am I just over reacting ? We have sex every other day and sometimes 2 3 Days I a row. When I'm on my period I like to please him still so I give him oral every now an again . On the third day of my period we try to have sex cause I don't have very heavy periods . So how much is he suppose to cum to were I can get pregnant is this why I'm not getting pregnant ???????????