I'm confused

So I'm so confused the last two time I've been pregnant they have been totally different my daughter I had no I dea until I was 9 weeks period had not came on so I just took a test second time I was 5 weeks and couldn't keep nothing down for the past 3 days I've been having light cramps headaches been nauseous to say the least yesterday day I had some really light spotting when I wiped AF isn't supposed to come on until the 26th yesterday I took a pregnancy test and got a positive but very faint so I said I would wait and take one again couldn't sleep for nothing but couldn't hold my pee anymore either so at 5 a.m. Took another and it was negative I don't know what to do help please should I wait until Sunday should I take another what should I do