Hi I Am 20 Years Old And I Have A

Hi i am 20 years old and i have a 11 month old son. I dont know if i am pregnant or not but i have been having some symptoms that are a lot like being pregnant. I am experiencing small hot and cold flashes, fatigue, getting worn out and out of breathe quicker than usual, nausea all day, i have been feeling more full, having tightening feelings in my lower abdomen, a little bit of dizziness and feeling of fainting. I have a weird menstrual but i havent had a period in a little over 1 month. The thing that gets me is if i were pregnant i dont think i would be far enough along to feel any movements in my belly; i have been feeling movements just like the ones of a baby moving... it feels like small kicking and swimming around or doing turns and flips just like a baby and at first it freaked me out and so i watched my belly and even saw a few movements... i dont know what to do i dont know if maybe i am pregnant or not i dont want to waste money on a pregnancy test. What do you think? I have read a lot about movements could be gas or even parasites but where are all my other symptoms coming from?