Heart Palpitations

JR • Little man born 5/28/2015. 4 losses (8/2016, 11/2018, 3/2019, 6/2019). Little lady born 4/18/2020
I've already seen my doctor and they're starting to run tests, but I want to see what the community has to say. 
I'm 14+3 and for about 2 weeks I've been experiencing heart palpitations. It seems to be mostly in the evening. I've read on other forums that this could be due to extra blood in the system plus hormones. My doctor is checking my thyroid and if that checks out I might have to see a cardiologist just to be safe. 
Has anyone else experienced this? What was your outcome? 
Thanks in advance :-)