i feel as though i can't trust my own memory of what happened anymore because everytime we have even a minor disagreement, she tells me that it didn't happen like how i said it happened,
i don't feel in actual danger, we probably have around the same physical strength. it's more just frustrating being told that my memory is incorrect, so i wanted to know if this is a normal thing to happen in an argument.
From what you say on these posts (though it's difficult to get a full picture form a few posts on the Internet) you are in danger. May be not of being physically injured by her (though even someone with less strength than you can still injure you if they use a weapon, catch you by surprise, or if you just get unlucky and fall the wrong way, etc.), but she certainly sounds like she's doing a number on you emotionally and with your own baby at 16 you have a challenging life ahead where emotional maturity and resilience will be critical. Doubting you own versions of events the way you seem to be beginning to can lead to a lot of difficulty in executive function and setting boundaries with others. These are essential to being a good parent.
I'm not suggesting moving out immediately is necessarily the answer, without resources of your own you may end up in just as bad a situation elsewhere. In someways, better the devil you know. But don't discount what this may be doing to you. You've come on here to ask about this so on some level you are aware that this is abusive and you need support, but you seem to equate danger with physical violence and it really isn't limited to that.
With a baby at 16 do you have some SS support? Or a health visitor you can talk to about getting counseling or other support? And working on a plan to be able to leave as soon as you can create a safe and sustainable home of your own should probably be a priority.