I had my period January 21st on my period calendar it says I ovulated on February 4th, I also had unprotected sex that day.. My period was do again February 18th, I am now 3 weeks late. I took a HPT 3 days after I missed my period but it was negative. I've been having these symptoms;

1. Fatigue.

2. Nausea, I've been really sick to my stomach and crampy, but no vomiting.

3. Minor neck and back pains, if I lean up or sit up for longer than 9 seconds my back and neck start to hurt.

4. Emotional, I've been crying like a 3 year old.

5. Hot flashes, I've been getting pretty hot in the middle of the night so I only sleep in a shirt and I keep my window open but I still wake up feeling like I'm dying.

6. Gas, it's embarrassing but I've been doing it a lot lately lol.

7. Constipation

And I've been having a lot of white like vaginal discharge and I've lost my apatite. I am a big girl and I normally eat alot mainly at work because I make ice cream but lately I haven't been really hungry I eat maybe twice a day but very small portions.

This morning when I woke up I got something to drink, layed down, smoked a cigarette (don't judge, I only smoke 3 times a day, I'm working on quitting) and all of a sudden my body got tingly and I felt really weak, it lasted for maybe 20 minutes then went away and I just felt sick?.. Then my teeth started hurting lol. And I've had acid reflux and heart burn all morning should I take another HPT or go get a blood test. And if the HPT is negative what should I do?