Post partum chest pains???

Okay so I’m 7 months (tomorrow) postpartum

Ever since having my baby I’ve been getting this weird feeling in my chest like the feeling of blood rushing through my heart. But 2 months after having him I’ve developed chest pain it’s seems to be getting worse! I also breastfeed idk if there could be a link to that. I’ve had chest pain due to anxiety before but never have I experienced it every single day for 6 months straight. I’ve had chest X-rays and ekgs which all come back normal. I don’t feel real anxious when it happens but it does seem to increase my anxiety. I’ve been told it could be costochondritis then recently like two days ago I went back because it’s gotten worse like constant pain around my ribs and chest burning sensation as well and was told that it was due to gerd which I’ve had since being 15 I haven’t treated it and have never had problems like this from it. Has anybody else ever experienced anything like this after giving birth or during breastfeeding????