Pregnant or not help me !

Okay so I have had like faint lines I think haven't had a period since May 9th I have read post online of woman not having enough hcg to get a positive pregnancy test only blood test. I hope that's my case but today I had sex with my husband and had this really really light pink blood only when I went pee and wiped and nothing since. I think I'm pregnant I have nausea,heart burn,late period and I haven't been stressed lately at all so that's not why I'm late