Health help

Hey guys, I'm 19 years old and for the past week I've been having some problems.

1- I'm about 6 days late to my period.

2- my back has been killing me a lot

3- every time I physically get up I get kind of lightheaded / dizzy.

4- I've been really fatigued and haven't felt like doing anything even things that I normally somewhat enjoy.

5- no matter how much I rest I still feel drained.

6- I've been having on and off cramps that feel like I'm going to start but I just haven't started. My normal period is 5 days long.

I need help and opinions on what I should do. I don't have any health insurance but if reccomend Ed I could go to a clinic near me..

Update: I ovulated from the 22nd to the 3rd of this month would that be long enough to feel these symptoms from pregnancy?