Could I be pregnant again?

I’m 4 months postpartum and exclusively breastfeeding. I haven’t gotten my period back yet. My husband and I had unprotected sex a few weeks ago and I bled a little during but nothing major. I started to feel crampy like my period was coming for a few days but then a few days later when I went to the bathroom when I wiped there was bright red blood so I assumed I was getting my period. I put a pad on and there was barely anything on it. I didn’t bleed again for a whole day then the same thing happened the following day. When I wiped there was blood again but nothing on my underwear or pad. I plan on testing but I haven’t left the house to get a test with everything going on so I just wanted to see what you guys thought in the meantime. Do you think this is the start or my period maybe? Or could I be pregnant again?