Chemical or false positives

Trigger warning!📍📍📍

Possible chemical pregnancy.

So last November I had a miscarriage. This month I felt off so I took a first response. It was light but definitely positive (first picture) then I took a cheapie and a Clearblue (second picture) both negative. Then the next day I took another first response and it was still positive but lighter (third picture) could those have been just false positives?

Last picture is them now.

I ended up getting my period but it was 1 day of spotting, 1 day of heavy bleeding and another day of spotting when I usually have 5-7 days of heavy bleeding. I’m also having neck/shoulder pain for about 3-4 days now.

Can someone explain this? Does it should like a chemical or just false positives and a weird period?