I dont really have an answer to your questions, but I am 5 weeks pregnant, and I get the odd pain in my lower abdomen, kind of like ovulation pain or twinges, and I have been told that is normal.
If you are concerned I would go see a doctor just to be safe.

When you say that you are having shooting pains does it mean that the pain comes and goes? Or is it more of a cramping pain that increases and decreases?

This is my third time being pregnant, but im concern, because I sometimes feel pain in my lower abdomen, though its not that painful but i feel so worried with this feeling. Im scared that this might hurt my baby or something, I was hospitalized and diagnosed for PIV and have a cyst on my right ovary, but i think everything was ok, since I was medicated with antibiotics. During this time, I have yellow discharges, and smell quite different, im scared that I have infection again, im too prone for this. I work as a technical support representative, my schedule is not normal, i believe stress is the culprit of my infection and Im worried that this will affect my baby, Im 7 weeks pregnant already...can anybody give any advice...Thanks!

the pain is most likely your body stretching for the baby.
my doctor and sister inlaw who is a nurse, both told me that as long as there is no bleeding with the pain[cramping/period like pain]everything is fine.
But if you think its something to worry about you should see your doctor just to be sure.
babylovely-if you think you have an infection, i dont think it could be from the antibiotics, because they are safe to take during pregnancy.
You might have a bladder infection, and it can be treated with antibiotics too, i had one early in my pregnancy, and made sure things would be ok. The doctor told me, that the baby wil be fine as long as its getting treated with antibiotics now, and said that if it weren't treated, it could result in early labour.
Ask to have an appointment with your doctor.

Bladder infection does not cause yellow discharge!

Babylovely, you need to go see your doctor and get an official diagnosis for whatever infection you may have. The pains you are having can be comepletely normal for 7 weeks pregnant. You may not have felt them in previous pregnancies but it isn't harmful.