Confused with early brownish discharge

From last two months we r on TTC..

My last period was on 16th sep and my ovulation is on 3rd oct. after ma periods I started to have xxx. But on 28th sep I started feeling mild cramps n I thought am gonna ovulate soon. So on that day I had sex. After that I had some brownish discharge on d same day itself. Not much like period its v mild,Even on next day 29th sep also had the same discharge.

So on I can't take this as implantation bleeding as it's too early , am completely confused.

Last month I had lots of symptoms related to pregnancy such as bloating , cramps n creamy white discharge. But after few days delay I had ma periods.

What might b the issue with me? Do any one had same experience?

Can I b pregnant even after having ma period? 😞😞

Pls tell any one has this problem