Blighted ovum detected. Tilted uterus!

4 months back i had a chemical pregnancy in which my UPT and blood tests were positive but one week later during my 6 th week i started bleeding and immediate usg was done but nothing was seen there.During that time my TSH levels were high i.e.7uU/ml.I was given 12.5 thyronorm. After 2 months of miscarriage i again conceived and changed my gyn , that time my TSH levels were 4.36 and bhcg was 111, so doctor changed to 50 thyronorm , adviced me to take 7500 ema hcg injection once every week, duphaston thrice daily, fol123 mf, aspirin 75 mg and doxinate tablets and asked me to come for scan during my 6th week. I went for scan and only small gestational sac was seen so she adviced me to come after a week.I went after 10 days and today also only gestational sac is seen and nothing else. They said its blighted ovum and asked me to come after 2 days to give me meds for miscarriage, so should i wait for sometime,i read that smtm it takes longer for baby to be seen on usg bcz of tilted uterus