Please help!! Am I pregnant?

So I took a pregnancy test about 12 days after conception. I got vvv faint lines on two tests. Around this time I also had brown/pinkish discharge on one day. I then took a few more pregnancy tests over 12, 14 and 16 days and I can’t seem to see any lines on my hpt’s. Sometimes I feel like I can see lines, but I really can’t.

It’s now 20 days since conception and I just don’t know I’m I’m pregnant. I have all the symptoms. My breast feel tender and sore, nausea without sickness. Fullness of tummy. Metallic taste in my mouth. My period is

Also 6days late at this point.

I’m also confused because last month I took Norethisterone whilst abroad. But not constitutionally. I would take 2 here and there it sometimes two for about a few days whilst abroad. During that tome I was bleeding one day then stopped a few

Days then bled 2days stoped

A few days. That’s because I would not use the pill in between. Anyways. Once I returned back home from holiday my ‘period, stopped after 2days.

I’m just confused. What do you guys think?