Is this a bladder infection?!

Is this a bladder infection?

It started about 4 days ago. I woke up Sunday and went to the bathroom and when I peed it had a strong odor and it kinda burned. The odor went away later on when I had to go, but it did still kinda burn. And throughout the day my vagina itched.
Monday I woke up with the same problems, but the odor and the burn only happened in the morning. But my vagina still itched throughout the day.
Tuesday I didn't really have the odor or the burning but when I peed it made my vagina feel itchy, but I wasn't itching when I didn't pee like the last two days. I also had more urges to go to the bathroom though. Ex: I would pee but still felt the urge to pee right afterwards and when I would go to pee it wasn't much.
And Wednesday I didn't have the odor, burning, or itching feeling, but I had urges to go the bathroom a lot in the morning, and then at night, but still when I peed, it wasn't that much.

Question continued with next post.

1 week ago
Reading about symptoms, I think I have bladder infection, because I don't think I'm having kidney problems because I'm not having any other pains than those I have already listed.

I could only to things that could be causing these symptoms:

1.) I started getting sick the same day my symptoms started. I've felt stuffed up, with a sore throat(mostly from drainage), tired, and sometimes lightheaded; these are usual symptoms I get when I'm sick with allergies or a cold. Being sick does strange things to you, so I thought that my symptoms may be from me being sick.

OR

1 week ago
2.) I was gone last Thursday through Saturday on a trip in Kansas. Where we were staying at, the water had too much sulfur in it so I didn't drink much water while there except on Friday while were outside playing games. The other days I just drank pop(and I usually don't ever drink pop) and milk. And because of being sick, I don't feel like drinking water, and I just don't really like juice, I haven't been drinking much. So my symptoms may be from just not drinking enough water.

Could this be a bladder infection, or something else? And do you think these could be the causes? Any other thoughts?

And please, serious answers only.

That happens to me if I drink sodas. I drink 60 oz of water and take cranberry pills. The juice is okay, but it has a lot of sugar in it and it can be expensive. Go to a drugstore like Walgreens or a grocery store that sells vitamins and look for cranberry pills. Pick up some AZO tablets as well. The AZO makes you pee "orange koolaid" but it works soooo well. If it doesnt clear up in a few days 2-3 usually, see a doctor.