Hi welcome to Healthcaremagic
There will be no pain, during implantation
... first you need to do UPT test, when the periods is missed, the Hcg
antigen will appear in the urine by a week... hence even though you miss the period you must test UPT only after a week... then the result will be proper... after that the pregnancy
will be confirmed by the USG>..
Hope I have answered your question..