I want to ask in how many days after intimation a gynecologist can detect pregnancy n my problem is that I got my last period on 21 Jan n I HV 28 days cycle n I got intimate with my husband on 1 and 5 of Feb n today I checked up with home pregnancy test which was negative n m 2 days die for my periods now n having pain in my lower back pain like period is going to start from last 2 days.N tomorrow I hv a flight of 2 hours so if there is pregnancy it would b OK to go by air so Lil worry.N when can I go for other home pregnancy test . Plz help .Thanku