Confused 🤔🤔🤔

Okay me and Hubby only had sex the 14th and the 15th (so I’m guessing I had to have ovulated between the 14th-16th) we were not trying but then this is where it gets confusing I got my first vvvvvvvvvvvfl on Tuesday the 23rd then had what I thought was AF cramps on Thursday the 25th but they were MUCH worse took a test because I had one more and the positive line was a little more visible and then ever since then the positive line has gotten darker this is the last test taken today

But I’m confused because how was I testing positive so early? And on the 25th could that have been implantation cramps? And if so how was I testing with vvvvvfl before implantation? And this is not our first we have little ones at home... please give me input