Any ladies who can comment about a previous abortion?

I had an abortion at 7 weeks (using the pills) 2.5 years ago. My cycle went back to normal afterwards and everything seemed normal. I've been trying to get pregnant with my SO for the last 6 months or so and we're trying really hard, tracking important dates, and having sex every day but still no luck :/ I've heard that having been pregnant before is a good sign but I'm worried something might have happened and that was my only chance at being pregnant :(  Any advice on this would help me so much! Thank you!