Okay so I've been in long lasting relations for a few years now... I was in one for about a year and a half then the next one was almost 4 years. With the first guy I was on birth control then I ended up stopping because I kept on forgetting to take it and we ended up splitting so I just stopped however we got back together and from there on we had unprotected sex every time I never once got pregnant. The guy I was with for 4 years, we never once had protected sex and still nothing happened, so we assumed it was cause he was shooting blanks, well we broke up for a few months and I had a one night stand with a close friend, it was stupid, there was drinking involved so again unprotected and once again nothings happened. I'm now seeing a new guy, we have unprotected sex as well, never once have we used protection and still same thing, nothings happened, so within the 7 years of having unprotected sex nothing has happened. It doesn't make sense that I could possibly have 7 years of luck. I'm not necessarily trying to have a child at this moment but the topic has been in the air a couple times now so I have started to become curious. I will be seeing a docter sometime soon here but some output until then would be great.

No one can even know, the men you had sex with would need to be tested for sperm courts. You will need to be examined to see if there are any issues.

But yes, some women have more trouble, some get pregnant the first time they have sex no matter if protected or not.
Others have to work hard for a year or two having sex only on the fertile times to even get pregnant.