Ay, rasa senak kat perut kan common je during pregnancy, tapi sebab ia kat sebelah kanan je, better you check dengan doctor to be safe, bisa jadi round ligament pain (very normal!) atau ada benda lain, kinda hard to say without proper check. Antara teman-teman I, some ada experience macam ni around second trimester and it turned out normal je, tapi kan baguslah confirm dengan OB you, esp if sakit nya intense ke atau ada bleeding ke. Jangan risau dulu, but don't tahan jugak, get it checked out, okay?