Hi. I completely understand. Late onset acne, adult acne and Rosacea are becoming more common in women. I have several thoughts I hope will be helpful:
You must not try to extract pimples. This seldom improves their appearance and, as you know, can lead to scarring. If counselling has proved of limited benefit, consider medication for depression or anxiety. I was very depressed about my acne and was reluctant to consider anti-depressants. Research shows that, unsuprisingly, people with acne or rosacea are more prone to depression and anxiety. I take Venlafaxine, and very occassionally Diazepam.
A good camoflague make-up will cover your blemishes and scars until you successfully treat them. My favorite is Toleriane compact make-up by La Roche-Posay. La Roche-Posay also make a great range of products for acneic skins, rosacea and damaged post-laser treatment skin.
I empathise with your reluctance to see another doctor or dermatologist, but diagnosis is essential for correct treatment. Hydrocortisone (topical or IV) will help with an allergy to plants/irritants but can make acne vulgaris worse.
An oral antibiotic such as Oxyetracycline is effective against many types of acne, including rosacea and peri-oral dermatitis.
A topical synthetic retinoid such as Retin-A will help with acne and scarring, and it can be used in conjunction with an oral antibiotic.
If you are still getting acne/greasy skin at your age ask your doctor to check your hormone levels, and prescribe hormone replacement if necessary. Acne is caused when androgens (male hormones found in both men and women) stimulate the sebaceous glands to produce oil. This oil mixes with bacteria on the skin, leading to acne. The most effective remedies therefore target one or more of the primary causes of acne: hormones, oil and bacteria.
20% of Accutane patients, including myself, require a second or third course. I then had stubborn scarring removed with microdermabrasion. You must wait 6 moths after Accutane therapy before having microdermabrasion due to the increased risk of scarring.
Please see my pictures in my profile. I am 32 and had acne for twenty years, but there can be a happy ending to the story.