sinus tachycardia

sorry not much help really on sinus tachycardia but i have a mirtal vavle prolaspe. my resting heart rate is normally 90 to 110 bpm. As it's a very minor thing with me it's not something i generaly have problems with.
i have to anti boi in labour and i general feel more tired than most people. also i get more palperations. but had scans and seen cardiogisit and theres no change and no risk with me.
guess your midwife will want you to see your cardiogist?