Confused

My last post was If people thought the picture below was implantation bleeding or not. Here's the story if you didn't read it... I had my last period June 26-30. Had sex July 9th. July 13th I had what you see in the pic for about 3 hours and it stopped. Now it's July 16th and I sleep naked. I woke up with a ton of discharge mixed in with brown blood. Not too much but enough that you know you'll be starting you're period. I got cleaned up and stuck a pad in my underwear. It's a little after an hour after I took a shower and used the pad and there's no sign of any blood. The past few days I've been having small weird feelings in my upper and lower abdomen like I have gas or need to burp and when j try to burp I feel like I'm going to throw up. I can't take a pregnancy test because my period doesn't come on for another 7 days so it's too early to test. Any ideas??