i have been suffering from thrush and been treated for a vaginal infectio.Swab result clear.I have recently lost weight but noe have a swollen belly,which feels heavy,passing urine frequently;Been referred for ultrasound to see if there are any cysts.I have been told by the doctor to take a pregnancy test,one was negative,but I was also told I should take one just before my period is due or it could give a negative result.Is this true,and it seems like i am feeling movement in my belly.Could this be wind.I am due a smear today,is it safe if i am pregnant.Please help.