Chemical at 5 week 1 day

Rebecca
Tested positive on 3 tests on Sunday 8th January which was 17dpo and then positive on a clearblue saying 1-2 weeks on the Monday 9th Jan.. everything fine we were delighted and then on Saturday 14th Jan so exactly a week later started bleeding, not enough to fill a pad just when I was wiping and there was some small clots.. I feared the worst. Phoned epu and was told nothing they could do as a scan wouldn't show anything before 6 weeks. I've continued to bleed and the flow is getting heavier. It's now Monday 16th and I took a test this morning and it says not pregnant. I'm so gutted. Been trying for over 12 months and this happens. Just want to stop bleeding as that's a constant reminder and hopefully get back into a regular cycle so we can try again.