I have one female child; 4 years. hpt negative. serum hcg negative. advised regestrone 5mg bd for 5 days on day 32 for withdrawal bleeding. could i be still pregnant after negative urine and blood test. feeling very much pregnant. nausea, backache, profuse vaginal discharge, emotional, stretching and bulkiness in lower abdominal region, giddiness, fatigue, etc. should i wait, get an USG at 6 weeks and then take the drug if no pregnancy ? would appreciate a quick answer.