High Pulse rate

Had a midwife appointment a few days ago, everything seemed a-ok, bump was measuring a couple of weeks ahead, but midwife re assured me there was nothing to worry about :) Blood pressure was fine, but my pulse rate was looking quite high! my pulse rate was measured at 112, apparently it shouldn't really exceed 100?also my iron levels have dropped, so midwives want to see me again today, i'm glad they're keeping a close eye now...but it has got me a little anxious if i'm honest!fingers crossed everything will be fine at my appointment this afternoon!