Brigitte, I am sorry that you are experiencing pain and an irritated stomach. Based on my husband’s experience and comments I’ve read from others on this board, it seems that the symptoms occur and/or get worse the longer a patient is having chemo treatments. Good idea asking oncology nurse about side pain. (I know from an earlier post you are reluctant to take pain mess due to concerns of getting too reliant on them. However, I think small doses for a short term can be a big help in maintaining comfort.)
I hope your upcoming scans show a good response to the chemo. Try to take it one step at a time. There are several other options to consider if the chemo stops being effective. I know this is so very difficult to go through, especially when you have lost your husband and sister. Please know there are many people that care and are here to support you. You are not alone.
Debbie