Baby #2???

So for my first pregnancy I didn't know I was pregnant until I was a week away from being 4 months. No symptoms nada. Call me crazy but I do not know what pregnancy symptoms feel like. So lately I have been feeling "off". I have been getting lightheaded out of no where. I'm nauseated 99% of the day especially after eating or drinking anything. I get so weak out of nowhere also and headaches have became my best friend. I am late for my period, I have been having massively watery discharge. This morning i was hoverinfb over the sink because i was seconds from throwing up but didnt. I'm not sure if there could be a possibility of pregnancy or not. Please help .!