### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi I am 35-years-old, we already have a 4 year old son. I have had several problems after his delivery like polyp inside the uterus which I had to get surgically removed. My periods are very irregular - between 18-22 days cycle.its also sometimes been as bad as not having it for three months at a stretch. Before our son it used to be around a 25 days cycle. We had sex on Oct 5th night. For the last three days I have had the feeling that my periods were to start but I only spotted lightly nothing like normal. I had a little spotting this morning but now nothing. I have been feeling quite bloated also but not like a normal MEN cycle -its more bloated in the mornings and better in the evening. I have taken a pregnancy test this morning but it came negative. Fatigue is really bad now and I am feeling very lethargic. But none of the other normal pregnancy symptoms like tender breasts etc. However I am also having backpains and my belly button is very sensitive on the inside and there is a constant tugging feeling. It can also be described as a tingling feeling and light pricking sensation from the inside. My mind is now constantly there. The feeling is constantly distracting me. I Forgot to mention that I do also experience a milder version of the same feeling at times during ovulation. My worry is that it might be a tubal pregnancy. Please advice I am getting quite worried

### output:

Hello, and I hope I can help you today. Pregnancy symptoms widely between women, and it is true that symptoms of ectopic pregnancy can include spotting and pain on one side. However, the key point is that these symptoms of ectopic pregnancy are only relevant along with a positive pregnancy test. If your pregnancy test is negative, then you do not have an ectopic pregnancy. You had mentioned that your cycles are normally very irregular, so it is certainly not unusual to have irregular hormonal symptoms as well when your period is late. The stress of worrying about pregnancy can even delay your cycle further, so I hope that you find this information to be reassuring. I hope I was able to answer your question today and that my advice was helpful. Best wishes, 