Help please late period but BFP&BFN


My period was due the 10th of Jan according to Glow but on other websites it was the 8th of Jan, so either way I’m late.

I did a test yesterday morning the due day of AF and I had a faint positive on a Tesco branded test. (I’ll insert picture)

Since that test I’ve had negatives on first respond and a clear blue. I know they might not pick up as early but I’m late for my period? Is this bad? Can someone help me with what to do please.

I’ve been feeling super sick and have been sick the odd couple of times. My boobs are so sore and so are my nipples. I’m so tired also.

Thank you x