Hi, I Apparently Had Scabies 7 Months Ago. I Have

hi, I apparently had scabies 7 months ago. I have since then used premetherin about 10 times, finally the itching stopped for a month in August but 2 weeks ago it came back. Can i really still have scabies! Over the last 2 weeks I have done another 2 premetherin treatments but the itching is getting worse, I take piriton at night at have been taking this for months. My boyfriend has never had any itching all this time even though we share the same bed, he has done the treatment too many times. I have treated my face too and have done flea treatment for my face and scalp. My mum thought she had it, I stay with her once a month and sleep in a single bed which she slept in when she had some visitors so she may have caught it from me, although bed clothes were washed properly. it is jut getting ridiculous now as I have been itching nearly all year! I did go back to the doctors in August but she said she didn't think I had scabies any more, I have never had any track marks but did have black bits coming out of my skin, however this hasn't happened this time around. I am getting desperate, help!!!