BFN after suspected implantation bleed

Faye • Currently taking 3mg Bromocriptine for high prolactin levels, 1000mg metformin a day for PCOS. 1 ectopic pregnancy ❤️
Well I done another pregnancy test this morning for it to give me the BFN :( after suffering an ectopic pregnancy 6 months ago I am concerned the 3 days of spotting may be due to an infection which could possibly cause damage to my only remaining tube :'( I did test a bit too early I guess. Not due my AF for 2 days according to glow. But according to my other ap called My Days I'm due my AF in 4 days