Is it too late?

Hey everyone! We are currently in month 2 of TTC for baby #3! Both of my children were conceived with IUI on the first try. With baby #3, we’re 14dpiui and testing negative so I’m out this month. But here’s the confusing part…. This morning I went to use the bathroom as usual. Took a test and was negative. I had pink/brown discharge. It wasn’t a lot either. So I put on a pad and was ready to call it day 1 of cycle 3 but I always wait until my flow comes in darker to make sure. I’ve been checking all day and NOTHING. Could this be implantation bleeding? Everything I read with 14dpo there’s a chance but I know with IUI it’s more timed and precise.

Has this happened to anyone? Is there still hope? Because I’m tired of the rollercoaster of emotions 😭

AF isn’t due until Jan 1st