If I had sex on june 10th and 11th, and my period came down on june 23rd, could I be pregnant?

Sometimes I feel faint, dizzy, a funny taste in my mouth, frequent urination only seem to be when I am by my boyfriend which is weird, and now I have a runny nose and a headache. My period is only about 3 days and is a medium flow but this time it was 4 days and heavier but within those days it kind of went up but then came back down and got light and lingered for the fourth day. Can anyone help