Going crazy

[BabyM2]

So I had sex on the 19th April,ovulation date was 15th April it was unprotected, I had been off the pill 3 days due to waiting for my new medication to come through, I had 2 days of very light brown / pinkish bleeding not even enough to cover a pad on the 22nd April, iv had sore nipples for the last 3 days so sensitive, tender, red and I'm so tired. Could this actually be very early signs of conception..... Freaking out, don't want to get over excited and don't know when to even think of testing as my period is due tomorrow