It seems unlikely, but does it matter who had it and gave it to the other? You both were obviously sexually active prior to being together, you're in a new relationship, and if you both didn't test before having sex, it may be impossible to find out now.
Just get tested and get treated, take your meds as directed - it's either a one time dose or a 7 day course of meds, and then either way, do not have sex with anyone at all for 7 days. Don't do it even with condoms, no oral, etc.
Make sure that if you are going to be with this partner again, that she has been treated, and waited 7 days since her treatment to have sex.
It's going to be okay, and remember that no one wins the blame game.
What AJ said. Mostly likey not but doesnt make a different. We all have lives before new partners. STIs are one of those things and its always good to test when starting a new relationship.
Open up, talk, test and treat :)
I’m sorry you guys I feel like I explained the whole situation wrong , I’ve been dating my girlfriend for 5 years , I recently gotten tested 4/19/2021 for everything and the results came back negative. My girlfriend recently told me last week she tested positive for chlamydia.I’ve slept with other females but I would always use condoms for everything. I recently gotten tested and my results came back negative again. My girlfriend swears she’s been faithful and haven’t cheated. Idk what to think. Should I get retested , did she have a false positive? Are false positive and negatives a thing ? I need answers :( please help