Missed two pills, can I be pregnant?

Hi there, I am hoping someone can help. I have just changed pill to Loestrin 20, I am now in my second pack of this. In the first month I had breakthrough bleeding practically throughout the whole pack, although, I had a period this only lasted 4 days. I finished my period on Monday 28th July and was due to start my second pack of pills 30th July, I forgot and started it 2 days late, therefore, I missed two pills (I still cant believe I forgot!). I had last night (4th Aug), is there a chance I could be pregnant even though I have been taking the pills for the last three days on time?