Hey guys, I just wanted some of your opinions because I’ve been going crazy

So I had unprotected sex the 1st of April and my period was due on the 4th of April

I had only a small amount of blood which was dark and only lasted a few hours

The 11th and the 12th I had cramping in my ovaries and then my abdomen which have now gone away

I’m now 11 days late on my period and 43 day’s into my cycle

I took a pregnancy test this morning which was a negative result but don’t know what to think considering I only had sex the few days before my period was due which was when I most likely was not at my most fertile stage

What are your thoughts x