PLEASE COMMENT...

So I’m currently 17 dpo and have all the symptoms of pregnancy. I’ve never in my life had to wake up and use the restroom I can usually hold it in until I wake up but now it’s right then at 6am. I’ve been nauseous, back pains, light cramps. I took a test a few days before I was supposed to start and there was a faint line then took another one the day I was supposed to start and it was a clear negative. I’m also 3 days late. Should I test again? Could I be pregnant? Or are my symptoms pms?