Welcome Psy and you have our support.
I am glad that you are posting and I know too well as many of us do that feeling of being alone and I assure you that you are not. What I do know is that getting sober ultimately for anything or anyone but ourselves (the rest is a blessing) can make it difficult to take the journey. Sometimes those same reasons used to quit turn into reasons to drink again. Its an ugly cycle. While your relationship may have ended, I encourage you to not look at sobriety as a means of winning it back but as the beginning of new healthy, positive you. You deserve better for yourself. I know that am grateful everyday I am in recovery.
Hopefully you can get your health issues on track. I do urge you to be candid about your drinking since I found any med used while drinking was never really helpful. Also having a recovery plan in place such as AA or counseling, etc. is tremendous in helping us live an alcohol free life. Baby steps my friend.
Way to go and looking forward to your journey!