help!

I know everyone is just going to tell me to take a test but I'm so scared. My fiancé and I had sex the entire month after I got off my period so I don't even know what day it would of been if for some reason I'm pregnant and we do the pull out until he gets close then we put a condom on. So here it is, my period is now 4 days late I keep having cramps like I'm going to start but it never comes my stomach is so bloated I felt nauseous the other morning at like 7am but I fell back asleep. My legs ache and my back and it hurts my stomach to put pressure on it. I've been really cranky and craving food just like any other period but I've never been more that 34 days it's always been 30 or 31 24 etc I'm very irregular. I don't feel pregnant because I feel like I would have more symptoms then what I have but everyone is different. My fiancé and I have also been fighting a lot so it could just be stress but I'm scared I told myself Friday if I didn't start by Monday (today) that I would take a test but I can't if my mom is home. I'm so scared:( what if I'm pregnant how will I tell my parents they already know that we've done it they would be so mad and even more hurt if I was pregnant:( please help!