dry orgasm?

last night around 8-8:30 my boyfriend and i had sex (we used a condom) and after he finished inside me, he pulled out and there was no cum in the condom? he said he had an orgasm but there was nothing in the condom which is really weird and has never happened before. he then put his fingers in my vagina and was digging around trying to see if the condom had a hole in it that we couldnt see but every time he pulled his finger out there was nothing but my usual liquids. i didn't think there was a hole because earlier he had been adjusting the condom and he said it felt tight and the little air bubble at the top was gone and he said it felt almost like a suction or something. anyways, is it possible he just had a dry orgasm? i didn't even know that was a thing but its bothering me that there was just no cum, and being the extremely paranoid person i am, i'm afraid that theres a chance i'm pregnant