Am i pregnant? or just going insane?

The first day of my last period was Thursday 26th March.
I've been having unprotected sex with my partner since the day I finished that period.
It's calculated that I would have been ovulating on the 9th of April.
8 days after my ovulation date (17th...

April), I had what I thought was my period. it was very different and worried me a little so I did some research online and found out that it could have been implantation bleeding.
I was on for 2 days. It started off pink, then gradually become brown. It was very light, and as I usually use regular or super tampons it felt odd that I only needed to use liners. On the second day as I started to come off this is when I got a bit confused as usually am on for 5-7 days.
I was originally due on for my next period on the 23rd of April... still no sign of aunt flo as of yet. Unless what happened on the 17th was my period?
I'm bloated, my breasts are sore, I've been getting light headed, no signs of sickness yet however I do often feel a bit of nausea. (Could be signs of AF coming to visit)
I've been doing pregnancy tests but they are coming up negative.. however one this morning showed a very, very, VERY faint line. Wouldn't have even noticed it if I didn't press it up against my nose to get a close look just in case, haha. But it's a pregnancy test I've never heard of, got it off the internet, not sure if it's trust worthy. I'm planning to get a branded test such as first response or clear blue. But am worried incase it's a negative.

If it is a negative... and what happened on the 17th was my period.. then I could have gotten pregnant since then.. meaning it would be too early to test...
So I guess I'm just going to have to wait for aunt flows next visit... not entirely sure when it'll be now! Guess it's just a waiting game..

What do you suggest I do?

Get a test and risk dissapointment?
Or keep waiting for AF?

I don't know what to do, why can't it be simpler! lol

WOW , thats crazy, you know I'm going thru the same exact situation , except the fact that I did not have any type of bleeding what so ever!, just you know, like that discharge / mucus right before or after a period? .. but thats it , for four days in a row I had that low cramping feeling like I was going to start my period the next day each time, but each time... She never showed?... The first day of my last period was anytime between 25th 28th... Its now April 30th and no sign of a period coming, other than the mucus / discharge last week and small / weird cramping feeling. I kinda think I am tho b/c I already have a two year old and the way I found out I was pregnant with her was that whenever I tried to smoke a cig I would get nauseous *and thats happening again* ughh

I am 21 years old, and have a two year old already ... I cant handle another, but wont have an abortion and know for a fact after carryin the baby 40 weeks and delivering him, I wont be able to give it up either.. I'm so scared!

If you had bleeding that was different to your usual flow then there is a chance it was implantation bleeding. Although you say you have taken tests- being multiple. The chances of on singular test being inaccurate is quite low, but multiple tests showing negative when you are in fact positive is *highly* unlikely. Sorry but I would personally say you are not pregnant. Although, you could always try a clear blue or first response as soon as you like.