Stroke/CNS probs’ etiology/treatment

My mom is a 72 year old female living in Singapore and diagnosed with hypertension 8 years ago, which was initially controlled via well-known BP medications (see below), but which medications she is no longer prescribed for unknown reasons. In 5/’09, while hospitalized due to methyldopa induced cholestasis, she was diagnosed with atrial fibrillation. In 8/’09, 14 days into Warfarin therapy, she fell (cause unknown), suffering a skull fracture causing an acute subarachnoid and subdural hemorrhage.  She was initially paralyzed on her left side.  She recovered almost 90% after 3 weeks.  On our request, she was switched from Warfarin to Aspirin.
In 12/’09, she had an open cholecystectomy due to acute cholecystitis with pigmented gallstones.
In 5/’10 , she had a minor stroke.  Her eyesight became blurry, she vomited twice and lost motor control, especially on her left side.  She was discharged from the hospital after 1 to 2 days.  She is now back on Warfarin (with the same cardiologist who recruited her for the Apaxiban vs Warfarin clinical trial back in 8/’09.)

For 2 to 3 months before the 5/'10 stroke, my mom had been suffering pain in her left shoulder, making it more difficult for her to sleep at night (she’s always had difficulty falling asleep).  The new medications (Simvastatin &Warfarin) seem to lessen the shoulder pain.

Sadly, she has been suffering slowly decreasing lucidity after the 8/’09 hospitalization, with etiology uncertain.

She monitor her BP 3 times a day :
Upon awaken before breakfast - around 140
In the afternoon & evening - around 120
She take her BP medicine after breakfast.

ECG results:
4/’09: Sinus Bradycardia & Atrial Premature Complex
5/’09: AF, T abnormalities
8/’09: (hospitalized for CNS hemorrhages) Sinus rhythm
10/’09: AF, T & ST abnormalities

Medications BEFORE 5/’10 stroke:
30 Amlodipine Besylate: 5 mg
Lisinopril: 40 mg
Atenolol: 50 mg
Omeprazole: 40 mg
Aspirin: 100 mg

Medications AFTER 5/’10 stroke:
Simvastatin 10mg
Warfarin

She has no other risk; CHADS is "1".

1. Her stroke symptoms indicate neuro problems. Shouldn’t a neurologist be her main Dr.?
2. Was her stroke most likely secondary to a blood clot (i.e., blockage), or hemorrhaging due to capillary wall weakness secondary to either genetic propensity or vascular wall compromise due to long term hypertension? How do we determine this? What testing should be done?
3. Should she be on the statin drug rather than a regular, time-tested BP med (like her original BP meds listed above)? Don’t statins have dangerous side-effects?
What should be the proper treatment regimen? Shouldn’t she be taking BP meds other than statins, especially while on Warfarin? And aren’t blood thinners possibly contra-indicated by her history?
Could her reduction in pain on the shoulder cause by the anti-inflammatory effect of the statin ? I have read numerous articles regarding the dangers of statins and am very concerned.