I Got My Last Period Which Was On 6th Dec

I got my last period which was on 6th dec 2015, I missed my period this time... I checked with the home pregnancy test on 10th jan 2016.. its showing positive... which means I m in my 5th week of pregnancy; but the issue is we both husband and wife dont want to keep this baby, as we have a 2 yr old boy and we are not at all prepared for another baby at this moment... I am using 10th jan 2016 fizinorm but my dought is it has any prablm without surgery and without side effects... If we plan a second baby after 1yr months is it possible without any problem.