Have any of you had like cold symptoms and have had light brown blood and been pregnant? On the 27th…

Have any of you had like cold symptoms and have had light brown blood and been pregnant? On the 27th of September I started lightly bleeding brown blood no cramps or anything and it lasted about 4-5 days and now I've been having headaches, lightheaded and ear pains for about a week. 2days ago my BF aka( Baby daddy)invited me to a BBQ and I took the boys so he could visit his dad my 16 month old is his son anyway I ate and took a very small sip of his beer. I was fine then about an hour and a half later I get nauseous and throw up. And yesterday I felt kinda queazy still...? Is it possible to be pregnant still???? I'm confused I know every pregnancy is different. But both my pregnancies I had implantation cramps and no blood . And this time I had a so called AF with no cramps. I took hpts 1 was before the bleeding and then i took one yesterday and it looked vvf. But I'm kinda doubting it was a positive because I took the same test afterwards and I didn't see anything. Sorry ladies for the long post but I hope someone can answer my question T.I.A