Your concerns are valid - and please allow me to extend my condolences regarding the loss of your mother.
I believe your best bet, at this point, is to make certain that you have frank and open discussions with your GP about your family's psychiatric history. S/he should be well aware of the signs and symptoms of Bipolar Disorder - and at least have some knowledge of mental health issues in general. When you go for your yearly *physical* check-up, I would urge you to insist upon a *mental health* check-up as well. If you feel working with a Licensed Mental Health Professional (LMHP) is also appropriate, then ask your GP for an appropriate referral.
Truly - your best defense is to be proactive and preventative.
With regard to further reading, I might also suggest:
(Grett's) "My Mother's Bipolar, so what am I?"
(Meehl & Meehl's) "Friends & Family Bipolar Survival Guide"
(Natheil's) "Daughters of Madness: Growing up and older with a Mentally Ill Mother"
Also, given that the suicide rate is higher among children of those who commit suicide:
(Fox & Roldan) "Voices of Strength: Sons and Daughters of Suicide Speak Out"
(Smolin & Guinan) "Healing after the Suicide of a Loved One."
I hope you found this helpful. I wish you and your entire family the best of luck.