First signs

What were the first signs of pregnancy for you? Lately I’ve been very tired, feeling bloated, and crampy, and I’ve been crazy emotional (which is something I am never). I shouldn’t start my period until the end of the month but I had what looked like spotting today... and yes, I have unprotected sex 3-4 times a week where my S/O comes inside of me. I’m on birth control though so I’m a bit confused. I took a pregnancy test and it was unclear whether there was a second blue line- it was very thin and almost not there so for all I know it could’ve been a trick of the light.