hi Jolos
I am also a mother of an eleven-month-old boy. I'm a mother of two actually, the older one is almost three. You seem to be on some kind of 'extended maternity leave' as materninty leave ended when your child was 18 weeks. In GB they also use 'parental leave'. But it doesn't matter :)
I came back to work (am a high school teacher) once the m.leave was over, that was 5 months ago. Being a full time mother (especially when there are two kids involved, constantly absent father and a flat to look after) is not an easy job. To be honest, school was the place where I could relax and calm down a bit :-)
If you don't want to 'forget your linguistc skill' , apart from visiting this forum, you should read books in English, watch films with eng subtitles, you can even talk to your child in English :-) That will be beneficial for both of you :-)
Referring to your difficulty conceiving the baby, Ive once read that 15% - 20% of couples have that problem so you are not in the minority.