Heartburn

I have been taking 50mg for 2.5 weeks now and have had consistent heartburn. I was diagnosed with GERD 3 years ago, so am used to having heartburn but taking Zoloft has exacerbated it noticeably. These days I’m taking 2 20mg famotidines to prevent waking up the middle of the night with intense heartburn. I understand this is a common side effect, but will it level out? Any other Zoloft + GERD users out there with similar stories?