The headache is very normal. I have a bad headache that last me for a week, morning to night.. some day i cant take it, i will take 1 normal panadol and sleep.. hot honey lemon will help too sometimes. Until 16 weeks then i feel much better, headache maybe once a month only. As for putting on weight, i think when u reach 20+ week then u will put on significant weight.. i lost weight in first trimester
Insomnia / fatigue is very common. Check with your gynae if you have a iron deficient and asked if they can allow you to do some light exercise