Ang 175 bpm ay normal pa naman throughout pregnancy, lalo na sa earlier weeks like yours, a few of us had similar readings and ang doctors namin ay okay lang daw, kaya don't worry too much! Just make sure you're having regular check-ups with your OB para ma-monitor nang maigi ang development ng baby mo, at if may ibang concerns ka or medyo off ka lang sa feel, better mag-ask directly sa doctor para sa peace of mind.