Currently on Ritalin LA...possibly need to change

I'm a 31yr old SAHM mom that was diagnosed with ADHD about 8 almost 9yrs ago. I was on ritalin, till about 3yrs ago, when I got pregnant with our youngest child. I stopped taking the ritalin, and wasn't on anything till this past August. I went on Ritalin LA.  I've discovered though that about 2-4pm, I have a really hard time focusing. My doctor prescribed a small dosage of ritalin for me to take at that time, but I can't always seem to remember taking it.

I have 3 children (ages 11, 9 & 2.5yrs), My middle child has a TBI, and at anytime during the week I have up to 4 extra children to care for. I need something long that would last longer then that. Is there really something out there that would fit me? I just recently went to a workshop that talked about adults with ADHD. It was very enlightening.  I learned that my moodiness, irritabilty and short-term is more then likely connected to it. I need something to help with that, but I'm not sure what.

I start looking at the other ADHD meds, and I get very overwhelmed. What are my options out there?  Some of the side effects of these drugs really scare me and make me nervous about continuing. The alternative isn't an option either for us. Also recently I started realizing that I  get very anxious when my husband gets ready to leave for the week, is this related to the ritalin LA or the fact that I was in a terrible car crash back in September?