Pregnant symptoms or in my head?

Laura • Hi, I'm👫💍 & mommy of👧🏻🧒🏻👧🏻🧒🏻👧🏻🧒🏻 and pregnant with 👶🏽 #7, I'll never forget about my 👼🏼👼🏼.
Hello ladies, 
So this is last months and as you can see I had sex the 16, 17, and 18 unprotected. I'm not sure if there are that close to my ovulation day cause my periods are not always the same. My baby deleted my period diary which kept all my previous periods and I lost all the information so not sure. I have been feeling just "weird" recently and hate the waiting day. I am not ttc and already have 5 children. Also, I don't really get ons symptoms other then bad cramps a couple days before I start my period and usually the first 2-3 days during my period. Right now I have experienced (on and off) heartburn, real bad lower back pain, a heavy feeling/pressure in my lower abdomen, sometimes I feel exhausted, not really hungry, constipation, diarrhea, snot-like discharge, sometimes after I eat I get a weak stomach feeling, cramping, and i feel super bloated. I still and like 6 day before my period should start but just really want to know if there is something I should even be thinking about. I did take a pt and it was negative, but I knew it would be cause it was super early. Do you think I might be pregnant? :)