Pregnant and chest pain.?

I'm 14 weeks pregnant and lately ive noticed a very dull pain in my chest, sometimes right in the middle or sometimes to the right or left side.. I thought maybe its just gas pain but idk it kinda doesnt feel like gas pain.. It never lasts longer thn maybe 2 to 3 seconds and its not on going through the day.. I'll just be laying down and i'll notice it.. It is kinda like a burning sensation.. I told my doc today and she seemed a little iffy about it and just told me to let her know if it gt ne worse.. Say it does get worse.. Wht would my doctor do..?? And has ne one else had this..? I'm only 19 dnt smoke or drink.. Lately i've been extremely lazy i dnt ever exercise like i use to... And i'm not overweight... It could be gas pain and maybe i'm just worrying too much but i wna know wht ya'll have to say... lol