I'm 15. My boyfriend and I had sex for the first time ever on April 13th as I was on my period. We used the withdrawal method and amazingly, he controlled his ejaculation and did it outside. After, my period was still flowing for a few more days. During this time, I had no symptoms of pregnancy and the thought of being pregnant didn't even occur to me.

We had sex again on April 28th with the same withdrawal method (again, performed successfully.) The day afterwards, I had light pink spotting only once (the first and only time yet.) I believe its abrasion during intercourse, but I am not sure. Only yesterday (May 1st) did I find some brown discharge. I feel a little nauseous (on and off), but that's the only early pregnancy symptom I have detected. My breasts are neither swollen or tender. My period is supposed to come in a week or two again. I am not any more fatigued than usual.

Is it too early for the spotting and discharge to show up? Is it safe to assume these are symptoms of PMS? Or am I pregnant?