Me And My Boyfriend Used Pull Out 4 Days After

Me and my boyfriend used pull out 4 days after I ovulated and I'm worried that I might be pregnant because of it, I have anxiety issues so maybe it's the stress that's causing my period to become late but over the past few days I've felt very dizzy and I feel like I'm always full but I make myself eat in order not to faint, plus I get random pains like cramps so this is all scaring me. What do I do?