Confused/ Maybe pregnant

So my husband and I have been trying to conceive our first baby since June and on August 10th we found out we were expecting. Unfortunately we had a miscarriage at 5 1/2 weeks. We waited until my HCG levels were negative. We had sex on sept 7th a week after the MC bleeding had stopped,which was around aug 31-sept 1 we used a condom but it broke and I started having cramping and had a clear Stretchy discharge from aug 8th-10th. Can you get pregnant so soon afterwards. And if so when should I test because I don’t know when to expect my period due to the miscarriage