I done a pregnancy test 4 weeks ago wouldn't show at 2 weeks, i had sex 7 weeks ago and haven't had a period in 6, I have sickness, cramps, mucus down below, lack of interest in food, I'm always tired, other symptoms are feeling dizzy hot and cold flushes and stuffy nose and head aches, along with body oains I have the lot, Could be a cold or I might be pregnant my sister said... I'm not 100% but just to be safe shoukd i do a test?