Irregular periods and dizziness

Hello Im 22yrs Old and lately me n my hubby had been wondering if i am pregnant.The thing is that i been having lots of preggy symptoms i wake up every single day around 3:00am-4:30am and cant go back 2 sleep so that makes me feel all day super tired and sleepy,also i had nauseas and dizziness one time i got really dizzy that i had to grab into a kitchen counter kuz i was afraid of falling,the veins on my breast are more noticeable,cant sleep on my tummy anymore (i always sleep on my tummy since i was born) at first i thought i was preggo and i took a HPT but it came negative and l8tr i got my period so i thought that it was period sympt. but my periods (2 periods) had been weird,i was l8te 4 my period (im irregular)but im always heavy the first day but this past periods had been super light and only last for 2 days and the next 3-4 days just some brownish spotting.I had sex and he came inside me but he was using a condom,den he used the withdrawl method w/o using a condom.