Help, am I pregnant?

Daisy

Recently my boyfriend has been away (from July 10th-august 20th?) and he asked me to go on birth control because I am a BIG worrier. Anyways I went to my doctor and she gave me Loestrin 20. I started this on the 17th of August and this was the first day of my period. I had condomless sex on the 27th of August and he came in me and then again on the 30th of August. I am very religious with my pill and I will take it 20:00 every day, and will only be 5 min late/5 min early. However I'm still worried as that's just me! My breasts are very sore and because of how worried I get I stress myself! Also I've feel like I've got discharge. Sex hasn't always been a positive experience for me and I want to feel confident. Could I be pregnant😞?