I am so nervous!

To start, I have been taking preventative measures very consistently. I’m on the pill and have been for years. I’m extremely consistent with my pill. Sometimes I am an hour late but I do not miss taking it (Alesse). We use condoms. Albeit not fully. What I mean by that is we usually start intercourse without and then use one midway through. I’ve never had sex to “completion” without a condom.

I’m supposed to have my period tomorrow, but I’ve felt off all week. Mild nausea and headaches. But I get headaches often so I didn’t give it too much though.

I took a test tonight that said “yes” and then two others that said “no”. I’ve been told that the no’s are likely because the hormone was depleted from my system from the first test. On top of this, my partner and I have only been sexually active 3-4 times this month. I know it would takes 1 time, but when you consider all things (condom, pills, frequency) I am truly dumbfounded. I’ll be calling my doctor tomorrow morning, but right now I am freaking out.

Advice? Is a false-positive possible?