Could I be pregnant?? Please I need opinions!

So on September the 17 and 18th I had unprotected sex but he pulled out, and a week later on the 25th I had light pink/red bleeding and slight cramps but I thought it was my period coming and my period did come the next day (26), it was like any other flow besides on the second day I had very very bad cramps to the point where I cried. And my period last 5 days, so on the fourth day it usually slows down and it did but the blood was bright red and on the last day it was bright red but very light. The next day I had a little red brown discharge but I also had unprotected sex that day amd the next morning but he pulled out every time, we did it twice and he didn’t pee in between on neither times, but later that day I had light pink discharge and then the next day it went from light pink to brown and the next day after that it pink again and now it’s the regular creamy white discharge, but for the past week I had lower back ache, felt like my head was warm in the morning , slight headache, barely any appetite for anything so barely eating , little constipation then diarrhea, bloated stomach, emotional the irritation (mood swings), my breast feel normal, a little gassy for two nights , and I took two test and they cane out negative and my urine test was negative , but can I still be pregnant from precum? Or what do you think this is