I tested positive for Covid on 22nd August, having started with symptoms on 19th or possibly before. I caught the infection from extended family who also tested positive. My symptoms lasted about a week. My household didn't test but all had the same symptoms, one of them tested after 5/6 days with a negative result. Now 12+ days after my symptoms started, I have Covid symptoms again (as do my extended family) and although I'm testing negative currently, a member of my household just tested positive.
Am I being unreasonable to think it's possible to catch two different strains of Covid within 20 days?