Low bp issues. And down with low bp.

I'm diagnosed with panic attacks and I've been using tablets for the past 40 days.. wasn't using for the last week.. since yesterday night I started having low bp issues .. I'm having this blacked out sensation whenever i sit and stand .. today whole day though I'm drinking lemon and salt water, I could still feel weak and down with low bp .. I've checked my bp in the morning after drinking lemon salt & it's 90/50 something with pulse around 90 In the evening it's 86/55 with pulse around 110 I already have depression issues where I'm unable to focus on my life, career.. it's very difficult for me to accept myself like this as i used to be a very independent child..now I'm dependent on someone for every small thing.. with all this going on, i started having this low bp issue which is a real problem and my depression increased quite a lot I hav 2 rotis wd dal&curd for bfast, glass of bournvita b4 lunch, good amount of brown rice for lunch, horlicks at 3pm, fruit @ 6 & rice for dinr