Hi Mitzi! Yeah, water stress is the biggest problem with blossom end rot. If the leaves were turning yellow before they dried up and fell off, that was from overwatering, too. The
peppers that are still on there could develop BER too, but you'll just have to wait and see. It would be great if you could post some pics of the leaves, but getting the watering right is the best thing you can do right now. I'd try to check the monitor to see how accurate it is. Maybe put some soil in a pot and check it dry, then with a light soaking, then thoroughly wet. I just don't trust everything to be accurate. I test my soil with my index finger, LOL. I have a good feel for it.
Actually,
peppers like for the soil to dry out a bit more than other crops. The BER could well go away, and you may get lots of
peppers through the summer. As far as I know, it's not so much heat as hot sun and humidity that affect
pepper production. Once the
plants get lots of bushy foliage and adjust to the sun and heat, they should produce well, barring other problems.