Ob check up

I went to my ob yesterday and they told me I'm measuring right on target about 14 weeks she said my blood pressure was high so she wants to keep a eye on it and offered me the makenna shots I declined them do she wants to do a cervix length every two weeks staying 16 weeks because I have had 3 premature baby's that's a lot of ultrasounds I will find out what I'm having at 20 weeks I'm excited ☺☺☺ this is my 5th baby I already have two girls and two boys baby's heartbeat was between 140 and 150