Sudden fertility, multiple losses. Help?

Sydney

I had a healthy baby 8 years ago, and have never been able to conceive since. I’ve never really tried, other than regular sex. We’ve chatted with a couple of fertility docs, but never pursued anything.

Then I found myself pregnant two cycles ago. I went back to the fertility doc for betas and found out my hormones were incredibly low, and was put on supplements, but lost baby. The numbers likely never looked good on this one, though.

4w3d: B41, E71, P1.26

The very next full cycle I found myself pregnant again, after taking progesterone and estradiol after ovulation. I continued to supplement, and had two great sets of labs, followed by a bad one.

3w4d: B14.4, E289, P18.6

4w0d: B59.1, E274, P36.4

4w2d: B69.7, E270, P30.1

The last test was yesterday, but my progression lines are lighter today than yesterday, so it does look like I’m losing this one too.

Does anyone have any insights? How could I have gone from nothing for a decade to two conceptions in a row, and why do I keep losing them? I am a healthy active person, 31yo. I don’t begin to know what to do to try to fix it, and I don’t want to keep going through this roller coaster every month. Any experience or advice would be so appreciated.