Pregnancy pain...

Hi everyone so Im 21 weeks and 3 days and a first time mom. The last hour or so ive been experiencing severe pain in my stomach and chest I thought it might just be heart burn but the chest pain seems to be continuous and same with the abdominal and stomach(belly button area) pain. I normally feel my daughter kick and move but since this pain has started I haven't. I don't know if the pain could mean shes in distress or something else is going on. Every so after the pain in my stomach/abdominal area gets worse then dies down. This is different then previous abdominal issues ive had before. Im not sure what I should do and its starting to worry me any ideas or suggestions?