Worried please read

madison
So recently I've been having similar pregnancy symptoms as my previous pregnancy. I was told that I am a very sensitive pregnant woman, meaning I feel things alot earlier (I'm that girl that feels full a day or two after fertilization) so I've been having symptoms that don't occur when I have AF. For example my breasts and nipples are extremely sensitive, I have constant headaches, weird pressure on left side, gassy, naseaous and I'm very emotional/sensitive (I had a meltdown from an open bag of chips). I've tested and I've gotten the faintest line, I'd be 3 ish weeks, yesterday I had brown discarge and some pink/brown blood. I've miscarried before and I was in horrible pain, and an unbelievable amounts of blood and blood clots. The last day I've had mainly light pink like watered down blood for 1 wipe then it's gone off and on (I'd have to wipe every 30 mins or so) there isn't near enough to wear and pad or tampon, and it's painless. Due to my last pregnancy ending in a miscarrage I'm seriosuly worried about everything should I be worried? ps. I have irregular periods so I never know when to expect af, I just had unprotected sex all month