Early bleeding - confused

Ashley • I`m 34 and a SAHM to our 3 1/2 yr old son. TTC for 15 months and now Baby GIRL is due October 14th!!!!
Here is my calendar for June. I had a chemical pregnancy and started bleeding on the 4th. Usually AF is 3-4 days long and this time it was 7. Now on CD 19 I started bleeding again. Yesterday was light brown and then light pink spotting and sort of sticky. Today it's red and still sticky. Is this AF? Is this normal after a chemical pregnancy? I also just finished strong antibiotics for pneumonia (that's why there is no BDing on the calendar). Could it be from meds? I'm so confused and don't know what to think of it all.  Any advice? Have you had a similar experience?