3rd chemical pregnancy in a row - should I be worried?

[Coffeeandcake1]

We have been ttc baby #2 since October, I didnt test for the first 2 months and just waited for af. The last three months I have had bfps at around 10 dpo / 11 dpo but keep getting my period when it is due then bfn.
This last month I got to 6 weeks pregnant but then got af late.
I spoke to a doctor who was very dismissive and even implied they were all false positives and said just to keep trying.
Should I be worried and has anyone had any experience of this? Any ideas what might be causing this?

@Coffeeandcake1
Sorry for your loses, must be very hard to cope with so many bfp's that don't progress.
I think if you are 6 weeks pregnant and bleed then this is a miscarriage, not AF? I can't see how it could be viewed as a late period? Surely they would scan to make sure no tissues retained etc in case of infection?
I'd want that pg to be recorded as such in my medical history.

I think it would warrant some investigation yes, can you see a different GP?

Go see a different GP, that is horrific. I have been under various consultants for this issue and every single one took them seriously and did not dismiss me in this way. You may have implantation issues, this is what my consultant suspects with me. I've been given blood thinners and progesterone. So sorry, it's a very lonely place to be

That’s not a late period, it’s a miscarriage, and you can be referred to the recurrent miscarriage clinic.

I was technically 5 weeks and 5 days so she said it wasnt a confirmed pregnancy and she seemed to be typing it in so I presume it was recorded. I did see another doctor as I had a little bit of bleeding at around 12dpo and she said the same, that chemical pregnancies happen a lot and often we dont know about them - but I do!
I might try again this month and see if it happens again, would be good to know if there was a reason I can get pregnant but but not stay pregnant.
I did read about possible short luteal phase as my cycle is 27 days but doc said this was still in average range

How old are you op?

Im 35