My last period was 11th of March, my next period is supposed to be 7th of April.
I had unprotected sex March 4th which is before my last period and I used a contraceptive pill,then I got my last period which was March 11th, so I guess everything was fine.
Then on the 16th of March, I had unprotected sex again,which I still took a contraceptive pill just in case but I know March 16th is my safe period day.
Then March 19th and 20th, I had sex using condom.
My ovulation day is between March 24th,so my fertile period should be between March 22nd-26th.
But I had sex with condom March 20th and 19th and didn't take any contraceptives.
Yesterday 24th of March and today 25th march (my ovulation period), I saw brownish blood spottings in my panties,it's kind of slimy and thin, I'm very scared, the first thing that came to my mind was implantation, but I know implantation takes like 10days after fertilization to occur, so even if I was pregnant , it wouldn't be too soon, because the egg needs time to travel to the uterus for implantation.
I read about ovulation bleeding, I don't know if that is what's happening to me,because this is the first time it's happening to me. Could I be pregnant? Can implantation occur 5-6days of having sex?(protected sex in my case)?

Any time you have sex, even with protection, pregnancy is possible. Sadly we can't tell you if you're pregnant. The only way to diagnose pregnancy is with a urine test taken at least a week after your period is late, using first morning urine, a blood test at your doctors office, an ultrasound at at least 5 weeks pregnancy, or giving birth.

In other words, we can't tell you what's going on. There's just no way to diagnose pregnancy online, or to even tell you what's going on.

You'll have to wait and see. That's the crappy part of pregnancy, it involves waiting, stressing, and worrying. Sadly, that's the way it is for everyone.

Good luck.