Having been on Zoloft twice, it's probably the fact you missed 2 days of the medication in a row. You can't stop taking it abruptly, currently this is my second time on it, and even if I take it a few hours later than what I normally do, I start feeling dizzy and often zone out of what I'm doing. The first time on it, I remember missing a day and felt really terrible afterwards. Just remember to decrease the dose gradually so you don't get those withdrawal symptoms.

You may have anaemia - I've had anaemia in the past, same symptoms. I was also really, really tired and irritable, and at one point I stayed at home, mostly in bed for about a week due to a severe lack of energy. It's probably worth getting a blood test to determine your iron levels.

But definitely speak to your doctor as soon as possible, even if you just ring up and speak over the phone (if getting to an appointment is inconvenient). Really, I'd just put the rest of your life on hold, and take care of your health first! It's your health that matters! Hope you feel better soon

I've taken the medicine you mentioned, so I cannot tell you if this could be this, nevertheless it sounds like the bigninning of anemia. I have a slight issue with iron in my blood and I keep getting the same thing. Have you fainted even one time out of these?
Have a blood-test done, it won't do you harm and it may show if that's anemia. Tell them you'd like to check your iron level. What's your blood-type? Some are more likely to get it, and it's nothing serios if that's just a slight shortage. You'll be able to fix it within one month, probably.

Take care!

Sounds like you might have a small case of anaemia to me.
Just eat lots of green leafy vegetables and red meat
And you should be better in no time

I have to echo all those before me in saying that stopping a medication like Zoloft is worse than never taking it at all. Zoloft is an SSRI, if I'm not mistaken. Serotonin has a lot to do with your body chemistry other than depression (which is why depression hits your whole body instead of just making you sad.) I don't know how old you are, but there are thousands of cases of children who have been taking SSRIs and stopped taking them for whatever reason and they abruptly committed suicide. When the serotonin levels in their brain dropped (quickly) from what the medication was maintaining them at, an abrupt deep depression hits them. This is why SSRIs have black box labels. Everyone has given a lot of great advice so far, but I have to say, if you start to have any depressed feelings or suicidal thoughts I urge you to call your doctor immediately.

probably the after effects from the zoloft. be sure you're eating a good quality diet and getting enough sleep.

also, you should get some good cardiovascular exercise to strengthen your heart and blood vessels. maybe take up jogging/bicycling/swimming

That's funny, you've phrased this thread like you were asking a doctor for advice.

But, none of us are doctors, nor are we qualified to give medical advice to anyone.

Thanks to everyone who has responded! I can't guarantee I will respond to those after this comment, but thanks for reading and trying to help (I think it's the Zoloft, so I figure my problem is solved).

It's because you went off the Zoloft. Zoloft withdrawals cause dizziness like you describe. It's happened to me several times when I've run out before I can get a new prescription. I second ~dark-sheikah; you should never try going off a medication without your doctor's knowledge. Lower your dosage gradually.

i do that all the time

one time i got up too fast and my vision went completely black for like a minute and i was on the floor.

shit sucks