Itching and burning sensations could indicate a yeast infe­ction. This condition occurs when yeast multiplies exce­ssively. One-sided swe­lling may also suggest an infection. Hormonal shifts, antibiotic usage, or a we­akened immune syste­m can also contribute to yeast overgrowth. Fortunate­ly, over-the-counter cre­ams, and pills effectively tre­at yeast infections. Maintaining cleanline­ss and dryness in the affecte­d region is crucial for preventing furthe­r irritation.

It seems like implantation bleeding might be what happened to you. It is when a fertilized egg attaches to the uterus lining which causes a pink or brown discharge. Moreover, nausea and cramping can also be the earliest symptoms of pregnancy. You might think about taking a pregnancy test if the symptoms persist or you skip your period.

Your menstrual cycle may go through some changes chastely after being vaccinated. The vaccine is known to be able to modify the menstrual cycle at times, but it's no cause for anxiety. Over time, your periods will return to when they were on their own. Meanwhile, always be healthy, be hydrated, and get enough sleep. 

If you missed your period and are worried about being pregnant, the best thing to do is to take a home pregnancy test to confirm whether or not you are pregnant. These tests can give you a reliable answer within a few minutes. Even stress or some other hormonal or health issue can cause a delay in your period. Kindly check with a gynec.

There are many reasons why periods get missed like stress, lifestyle changes etc. If you think it is because of pregnancy, I suggest you to visit a gynecologist and get some pregnancy tests done to confirm it. 

The painful menstruation is common for many women. One should get some rest, warm up and use a heating pad to reduce the pain. However, if the pain is extreme or bleeding is severe, you are advised to see a gynecologist for accurate diagnosis and treatment.
 

Yes, it's possible for fibromyalgia to develop after a C-section.

You might be having genital herpes which can develop painful red bumps in the area of the vagina. You should go to a gynecologist or an STI specialist in order to get the right diagnosis, and treatment.