Pregnant or period?

So this is my period calendar. I usually start a day early but this cycle I started 6 days early. All my periods are heavy, but I have spotted from Thursday the 6th until yesterday afternoon, the 9th. I bled enough for four days for MAYBE half of a pad all together. Very very rare. I had unprotected sex on the 27th and 28th, 12 days ago being the last time. I took a test yesterday and waited a half hour to check it and it had such a faint positive that it had to be up in a bright light and still took a second to tell it was there.

I was so sick yesterday, so nauseous and vomiting. I also have a toothache so some people say I could've just been sick from that but it's just not a coincidence for me. We are trying for baby #2 so if anyone has any advice or opinions about this crazy "spotting" please let me know!! Thanks so much.