I think I have finally done good for myself.

I have a 28-30 day cycle and my last period started on the 30th of January. Yesterday, my boyfriend and I had anal sex with a condom on. He thinks it's kind of dumb that I make him wear one but it's just another way to help relieve me from my severe anxiety about becoming pregnant. I'm 17 years old and my boyfriend and I have been together for 2 1/2 years and are just now starting to explore sex. I don't want to have vaginal sex until marriage..like I don't know I just do. Anyway, we had anal sex with a condom on and then he ejaculated no where near my vagina. He then played with me a bit, and then after I made him climax again no where near my vagina. I am just really scared of pre-ejaculate that could have been on the condom or something or even possibly on his hands when he was fingering me. Is there virtually any way I could be pregnant from this situation?