36 weeks 2 days pregnant and on procardia

So I’ve been told to take procardia every 4 hours (10mg) but I am still having contractions through it. They aren’t too close together, but are still really painful and it feels like my lower area is stinging. Is it okay to double the dosage to help? The last time I was checked I was dilated just 1 centimeter which was Sunday. The hospital I went to has been the only people who have checked my cervix since I was only 12 weeks pregnant and I’m worried that if I call my ob and tell them all of this again they are just gonna push it off as round ligament pain again (my ob didn’t even tell me I needed a tdap shot so I just got it last night with a flu shot, it’s been rough!). But I also don’t want to go to the hospital again and they just tell me to keep taking procardia until I make it to 37 weeks. I’m in a lot of pain and I just don’t know what to do.