Spotting/brown discharge at 5 weeks?

Meghan

I had very light spotting this morning at 5 weeks, a light brown color essentially, and a tiny bit this afternoon. I feel like I'm past implantation bleeding time, but the nurse said it could be that. Or my weightlifting yesterday (which I admit was too heavy since I have no symptoms to encourage me to slow down). Or ectopic or miscarriage. It obviously could be all the things, I'm keeping an eye on it, and in touch with my doctor. I think I'm just looking for others experience with this as it didn't happen with my first pregnancy and I've never had a miscarriage. If you're open to sharing, what happened after you experienced this? Did you notice a pattern around exercise? Thank you!