HELP! PREGNANT ?

i am so nervous to even think about it but i am on birth control i take it daily and try to never miss it but i am not always exact about my times my boyfriend and i have had some unprotected sex here and there but he has never came inside of me ever and we have been careful about it but almost always use condoms i am only worried bc after i sucked his dick a couple hours later i had unprotected sex with him until he grabbed a condom but again he didn’t come in me i am only worried that there was pre-existing come left on the tip of something i take birth control and am on the 4th day of my period week and still no period just symptoms from a period that i dont want to confuse with early pregnancy symptoms