Bleeding 7w4d

So, Friday night 8/1 my husband and I had sex, not for the first time since finding out I'm pregnant. Yesterday 8/2 around noon I noticed a very tiny amount of brown blood when wiping. It escalated to pink/reddish brown spotting through the rest of the day. Called the office and they said that it is normal after sex and to go to the er if I soak a pad in 2 hours. This morning I wake up and it's still bright pink or reddish brown every time I wipe. Very small amount caught on panty liner. When do you know to go to the er? Losing my sanity slowly but surely here. First pregnancy.