Is my mind tricking me with these symptoms or am I really pregnant 😯

Hey ladies im trying to find a bit more understanding to what’s going on with my body. My last period was December 20 2018 and I ovulated around the 5th of January which scares me because I know I totally had unprotected sex that day 🤭 I’m now 18 days late which would be 6wks preg. and been having ALOT of clear discharge (I always think it’s my period but nothing). I have slight cramps, sometimes abit more intense every now and then but no period. I’ve had a massive loss in appetite this week and only just started eating here and there but feel nauseous every time I think of certain food, and also experience breast tenderness. I tested when I was a week late and negative. I thought it may be due to stress or hormonal imbalances why it is so late so I tried to wait it out but still nothing to this day. Is my mind tricking me with these symptoms or am I really pregnant 😯 do I take another test?