MsGrowingGirl20, your sign is about as full-proof as a crackhead praying for $20 to buy some crack, and low and behold, he finds $20 tucked away in a drawer.
Understand that coincidences are a fact of life, and that your "sign" is nothing more. Say you hadn't heard that talk. You might still have been asking for a "sign" a week later. 2 weeks. 3 weeks. FINALLY, a talk comes on, dealing with doubts. Was it 1.) God answering, 2.) your refusal to accept the obvious, 3.) a coincidence?
Before you come to the conclusion it was God, you have to accept there are other explanations for these types of things, and rather, I bet you that brother giving that talk didn't even address any of the specific doubts you had/have. He may have briefly mentioned them, skimmed over them, told you with a text, doubt it bad, trust in Jehovah, all matters will be resolved, and just waved that magic wand in front of you.
The doubts don't cease to exist, untill you have addressed them. You might think you can go back, but they will just keep nagging you. You will see the fallacies. Trust me, after ~1 year of leaving the JW's, but then going to KH shunned for the sake of holding the family together, even when I tried to believe, my logic would just cut away at their fallacious logic. Their open-ended questions, vague statements, inconclusive answers, and their classic "wait on Jehovah".
Put yourself in the shoes of a catholic that hears about all the church corruption, then hears something similar, "wait on God". It's no different. The religion is broken, and it just doesn't want to admit it.