I am 42 years old. I have a history of period problems but was having a regular period again until I had unprotected sex. My last regular period was the second or third week in January. After I thought I might be pregnant I took six at home pregnancy test over a period of two months they were all negative, but my period never started and I had some nausea, vomiting etc. I did have a very light period in April it was mostly spotting for two days. By my estimation I would be 17 or 18 weeks pregnant by now and am not having any symptoms except the missed periods and I have gained 16 pounds over the last two months. Most if not all of that weight has been in my abdomen and it is really bloated at night. I am bipolar and suffer from chronic back pain. I take several medications a day one of which was seroquel which I blamed the weight gain on. I am very self conscious about my body so I started taking some of those fat burning diet pills for about a month. When that didn't work I started walking three miles a day but still no luck with the weight. Yesterday I had a headache I thought from getting over heated, I laid down and took some ibuprophen. After a couple hours the headache was gone and I decided to take a shower, I got so dizzy I thought I would faint. Eventually I just had to sit down to complete my shower. I continued to be dizzy after I got out. Today when I got up to go on my walk I felt dizzy again and just kind of ill. Besides of al the medicines I take I have had MRI'S CAT Scans etc. that could be harmfull to a baby. I just don't know what to do.