15 days late

So today makes me 15 days late. Me(23) and my boyfriend (24) are sexually active without penitration due to reasons. We do "grinding"without clothes on. I know there's a slight chance. I took a test a week ago and came back negitave but my symptoms nausea, cramping, swollen breast, lower back pain, tiredness has progressed. I have an appointment with my gynecologist but should I take another test before my appointment?