hi i had sex in April after i had menstruate . after i had sex i took some antibiotics two weeks straight but spotted 5 days after intercourse. since April 23 i haven't menstruated up to today. at exact 3 weeks and half, i started vomiting and bad taste, hungry, tired, low back pain , pain in my breast. i went to the hospital June and they did urine and blood but said negative. i continued to have pregnancy symptoms and its two month i haven't menstruated. could i still be pregnant although the test was negative in June.