On the pill and possibly pregnant?

I've been on a birth control pill for over a year now, been taking them daily. I missed one or two of the pill without meds in them. My fiance and I have had sex during the week of my period on more than one occasion.

Over the past month or two I've been getting nausious at various times during the day for no apparent reason, my nipples are tender, and sometimes I'm quite tired. My question is, is it possible I'm pregnant, and can I tell with one of the home pregnancy tests such as the e.p.t. since I'm still taking the pills.

I remembered after I posted, and didn't see an edit function.

Certain foods, like milk havemade me nauseas during the past month or so as well. Is this what food aversion is and is it a sign of pregnancy?