Feel like I’m falling apart at 23 weeks

Last week I had an episode with my heart rate getting to 250 beats per minute. EMS took me to the ER where they admitted me they kept me over night and diagnosed me with SVT. They say this isn’t from the pregnancy but I’ve never had heart problems before. They gave me a beta blocker as needed and I’m still having flutters so I have to take the meds. At 23+2 my blood pressure has been 90/56, the dr didn’t seemed alarmed at my check up last week with it being low. I feel like since I hit 22-23 weeks I feel like I’m falling apart and trying to kept healthy for my little one. Anyone else experience this type of stuff with their pregnancy? This is my first baby so I’m sure my body is still adapting to changes.