Placenta previa

Hi, I've had several spotting this is my third pregnancy. My first born was 10 weeks prem, and recently I've not been able to walk long distances because of how much discomfort and pressure I've had on my pelvis. I'm spotting say every 3 weeks just a few times not badly, I'm think I have placenta previa the more I read on it. Can any one help? I have the midwife Friday will defo be bringing it up. I also bought myself a pregnancy bump strap for my belly arrives today to try take the pressure off my pelvis as I'm depressed even not being about to walk my children to school it's horrible. Any advice would be amazing, I've had all swoops done from my first spotting so I'm all clear that sense.

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