Why hasn't my period returned after abortion?

Excessive hair growth on face and body can be a symptom of hormonal imbalances as in the case of PCOS. Pubertal development may also be delayed in this condition. You should see a gynecologist or an endocrinologist for further evaluation and management of PCOS.
 

There is no chance of getting pregnant from sperm touching your skin.

Cramping is a common symptom of the menstrual cycle and can occur even if the period is delayed. If you are sexually active you must consider the possibility of pregnancy and take a pregnancy test to confirm. a gynecologist can evaluate so please take an appointment

If you have been trying to conceive for two months and have no specific concerns or underlying medical conditions, it's generally normal for it to take some time.

15 days delayed periods after unprotected intercourse can be a sign of pregnancy or may be some other health issue. Please talk to your gynecologist

A woman could be pregnant if she gets a menstrual cycle after having sex for 11 days, but other times, this is not the reason behind it. You can see cramps in this regard or some bleeding that is not typical of a period. This may be due to the changes in your hormones, or there may be other issues that have lead to this. To diagnose the situation, it's advisable to take the pregnancy test a few weeks after the last time you had sex. Although it's not necessary to have periods after 11 days each month of the sexual act, it does occur sometimes, but it's not always indicative of pregnancy. 

The light bleeding and vaginal itching could likely be attributed to a post-D&C infection. I would recommend you go for a gynecological examination and treatment.