firstly,we will discuss the present situation,which you to tackle.From 7th april to 12th april,you daily do the sex,as this is the period when ovulation occurs and during this time sperms meet the ovum , chances of pregnancy
are more.after sex do not stand or go for toilet for few hours,try to retain semen inside vagina by raising that part.
now we will discuss the points,which you are having.
as your wt is over wt,you consult physician to rule out,thyroid
as these may create problem for pregnancy.