Pull out while fertile !HELP!

So, what are the chances of me getting pregnant/being pregnant if I had sex using pull out while on the last two days of my fertile window... let me just say my boyfriends semens clear which means he might be sterile but we don’t know yet. What’s the chance I could be pregnant if he didn’t cum in me... HELP!!! 😭

(I’m like 2 days late to my period and freaking out) my periods irregular though and I once had a 40 day cycle so should I even worry?