Placenta previa...calling previous c section mamas

Jessica • Boy mom 👦🏼💙👶🏼
So I had a c section with my first almost 2 1/2 years ago. I'm 16 weeks with baby #2 and I've been experiencing a lot pressure and even se cramping. I went into my doctor last Thursday because the pressure was so bad and my dr have an ultra sound and vag exam and said everything was fine and to just take it easy..
Well off and on since I've had pressure and some cramping, could it be from scar tissue stretching from the previous c section? Or I've read that having lots of pressure can be a sign of placenta previa...just wondering if anyone else has had simar symptoms. I go back to the dr on Tuesday 😕 thanks ladies!