I used citronella on our first day in the rainforest on our honeymoon this December and got 16 very large, very painful mosquito bites. I wouldn't recommend relying on it! Also, it had to be reapplied every half hour which was not practical. I then switched to 100% deet though so no helpful suggestions, sorry.
I couldn't brush my teeth at the back after I had my tonsils out this year, mainly it just made my mouth taste even worse that it probably needed to, but no lasting damage when I went to the dentist to get them cleaned a few months later. I used a strong hydrogen peroxide mouthwash which probably killed everything!
Huge congrats on the twins and really sorry to hear more sad news. This baby making process doesn't seem to run as smoothly as you imagine in the days when you are trying to avoid making one.
Felt sick pretty much all day and now lower back ache like I get before a period which I am hoping is not a bad sign but don't want to google it as there is so much scary information on the Internet.