I have a question about FRER

I took one just now (I’m post partum and haven’t had a period yet, however I’m having unprotected sex). Does an indent line have a pink tinge to it? I saw a line immediately as the space was filling up and it was colourless, but within 3-4min that line was still very very faintly visible, and has a slightly pink tinge to it.

I also had crazy onset nausea today come out of nowhere. Coming and going. Feeling fine, feeling terrible, then fine again.

Is this a normal ident line to a FRER test (I’ve never seen an indent line before) or could I be preggo?