frequent urination?

Hello, about 3 weeks ago I had unprotected sex with my partner, he didn’t ejaculate in me. Lately I’ve been noticing that I have to pee more than usual, the other night I accidentally wet my bed. I find myself having to pee a lot more than I usually do. This past Monday I got dizzy for about a solid 5 seconds. My period is supposed to come in two days but I haven’t experienced my usual period symptoms such as pressure on my lower back. I got really bad acne which I usually don’t get during PMS. Could I be pregnant?