Just curious and could use some advice!

De
Hello! 
Uplifting everyone on this site :) 
I finished BC in May. Got pregnant right away (to our surprise). I had a miscarriage back in April at 5 weeks, fell pregnant again in May but didn't make it past about 4-5 weeks (possible chemical). I'm just worried, and curious of success stories! Anyone similar? Could it be from BC? Any thoughts are appreciated!
Thanks ladies!