HELP!!!!

Andrea 😊 • Mom, wife, and student

So I am 17 dpo no AF and 3 negative pregnancy test. I am so last don't know what to do, I had a miscarriage in 2015 I am wondering if something went wrong then

I want to go and see a doctor but I am afraid that we might end up spending more than what we have I do not want to spend a lot of money trying to get pregnant and when we do we can't take care of the baby😥