Please help calm my nerves

Just felt a wet sensation which I had in past. I went to bathroom was some regular discharge and when wiping I noticed a very tiny like grain of salt Thor dark and bright red blood. Now I am so freaking out as I haven’t had this before. I did not have any penetration or sex or exam anything at all. I am almost 33 weeks. I asked my ob friend she said it’s ok but I am so worried. Office closed doctor closed and there is snow storm so don’t want to go far to hospital over and hour if it’s nothing. Did this happen to anyone?