Contractions

I am 28.5 weeks. This is my second pregnancy. My first son I went in to labor at around 32 weeks and they put me on magnesium for a month to stop it until baby was strong enough to be born. I was off for probably 3 says before I started going in to labor again. I ended up being eclamptic and having a seizure so I had to have a cesarean...anyway. All day I have been having these very short bursts of contractions. Like maybe 5-15 seconds long. I can't even properly time them because they are so short. Like when you have to pee and it causes Braxton hicks. However they have just been going on pretty consistently all day. I notice when I go to the bathroom they do stop for a bit so I have been going more frequently than I actually need to. Just wondering if anyone has any similar stories or advice? I call my dr so frequently about every little thing. Plus I am highrisk because of the eclampsia I had with not signs of preeclampsia so I already see him every other week. I hate to bother him over something that is potentially just more Braxton hicks, so I just thought I'd get some community thoughts first.