What to do from here!?!? 😓😢😪😥

Brittany • 20....married since 7.16.14. TTC #1.
I'm 20. Hubby is 25. We have been TTC for 14 months. 😢 every month I get a negative and my heart breaks! My sister is already on baby #3!!!! What is wrong with me!!? Should I visit a doctor?? I am a bit overweight, maybe that's the reason??? I'm confused and hurt! I feel as if I'm backed into a corner. Uggghhhhh
​#rantoverÂ