Please Help - no period BFN

Here is a little background story:

I’m 25, I live in Belgium 🇧🇪 and I’ve been ttc since April 2017!

I had two chemical pregnancies during the summer and it was really hard feeling like I was failing..

so back to now, I’m 6 days late. I usually have a pretty regular cycle (29-31 days). Af was supposed to show up on the 5th . On the 2nd, boobs were sore and hurting like crazy so I thought « oh yeah there are going to be right on time », except they are not . I have huge mood swings and the top of my back is hurting like crazy, I also have abdominal pain and cramps.

I have been taking tests since the 5th and all of them were BFN.

Is there anybody here who experienced this?

Or somebody able to give me some highlights ?

Thank you a lot ladies, I kind of feel lonely about all of this ...