Sayang, tekanan darah yang rendah macam tu memang kena check dengan doctor, especially kalau you're feeling dizzy, lemah, or blur-blur. First trimester mmg banyak changes dalam body, tapi 93/50 tu lebih on the low side dan kena confirm dengan your OB/GYN je, jangan self-diagnose lah. Go see your doctor soon ok, or kalau you're feeling really faint or shortness of breath, terus ke emergency. Better safe than sorry during pregnancy!