Re: hair on chin at chest
Birth control pills are not all alike. Some are used to treat (not cure) PCOS, poly-cystic ovarian syndrome, and some can cause unwanted facial and body hair. There should be an insert with information, directions, and side effects included with your prescription. It takes 3-6 months for a medication to stimulate dormant follicles, so I doubt it is the pill in this case.
There are many reasons for hair. Hair on the chin is rarely due to hormonal abnormalities. Genetics or aging are most likely the culprit. Only when there is a great deal of hair on the chin and other areas and other symptoms would I suspect a hormone abnormality. I am very adamant that women with those symptoms seek medical attention and testing for male (not female) hormone levels and insulin resistance. I would never recommend wasting your's and the doctors time for 2 hairs.
It is unwise to tweeze or wax facial hairs (other than brows) since follicles that are sensitive to male hormones can easily be stimulated by the tweezing/waxing. That also includes using a face epilator. The wiser temporary methods of hair removal that won't affect the structure or the germ cells of the hair are: shaving, clipping, depilatories, and bleaching. For permanency, electrolysis (aka diathermy in UK) is a better choice for small amounts of hair. But if it's only 2 hairs right now, I would simply clip them. Laser is definitely over kill for 1 chin hair and 1 chest hair.
There is a lot of misinformation still circulating 80 years after it was proven false. Shaving does not make hair thicker. It was proven in 1927 by Dr. Mildred Trotter. Shaving simply removes the tapered tip of the hair strand leaving the blunt cut stubble. Once that hair sheds and is replaced, the replacement hair will once again have the fine tapered tip until it is again cut.