Doubtful :(

Hello ladies!

So i'm 30 weeks pregnant with my first baby. At first my husband and I decided we didn't want to know the sex of the baby .. but as the weeks went on we just got a little to impatient! .. so at my 24th week appointment I asked my Dr about the sex of the baby and she told me its a boy.. my husband and I were so excited ofcourse .. now before I go on I am a little overweight but that didn't seem to be a problem for the Dr. So I got transferred to another clinic at 27 weeks and the Dr took a long time going through the ultrasound and so she didn't go through any details with me. Nor did I get to see baby .. so I asked her if everything was okay. She said all is well and so I wanted another opinion on the sex of the baby and she said to me she couldn't determine the sex of the baby because i'm obese! And therefore the picture was not clear .. okay so my pre pregnancy weight was 78kgs .. and at 27 weeks I was 88kgs. Now i'm so doubtful about the sex of the baby .. has anyone been through this before? I'm so annoyed at the Dr!