Hi Madam My Pregnancy Confirmed On 14 May 2016 By

Hi madam
my pregnancy confirmed on 14 may 2016 by home based pregnancy kit. my last menstrual period start date is 14 April we inter-coursed on 24 -26 april after this i observed light blood spotting in very small amount on dated 5 may but after that it is not observed till date is it normal or any risk?when i should perforemed my first sonography scan ? how many and when i should performed sonography scan during my pregnancy