Has anyone bled before finding out they were pregnant please help!

I know it's probably rare but I've been having weird bleeding since last month around June 21 I had some light blood then brown discharge June 22 I had some light bleeding June 23 I had some brown blood I took a pregnancy test it was negative. The next day it was light bleeding again then around June 25th I had light bleeding then I wiped and saw blood that looked like a period then after that it stopped. Then on July 12 I had some light bleeding again then the next day light blood and brown discharge yesterday it was light bleeding and spotting. Yesterday I saw period blood so I wore a pad but now it's just light red bleeding and spotting that's on and off  it's not following the actual flow like I don't need to keep changing pads constantly like how I usually do. I'm not sure if I'm bleeding after sex or if I'm just having a weird period I haven't been stressed lately or anything. Should I repeat a pregnancy test