Ttc baby #2

Hello everyone im 22 my partner and I have been together for 6 years and have a 2 year old daughter. We are currently ttc baby #2 I have takin an ovulation kit after my cycle this month and it said my surge was on the 21st into the 22nd. We had intercourse on the 19th and 22nd. It's now the 25th and my nipples are tender? My breasts normally get tender around my cycle. This is the first we've really tired our daughter was a surprise. So I'm unsure as to what to look for is this a system of ovulation? I don't want to trick myself into thinking I'm pregnant and have heartache if not. Thank you for your input in advance ;)