The only true way to know if it is twin is ultrasound. However, your doctor can look at your HCG levels and get an idea if it is a possibility. You being a twin definitely increases the odds, I think.
Every pregnancy is different so it is hard to compare your previous with this one, it may be just a singleton but with different symptoms and it may in fact be twins, again an ultrasound after 5-6 weeks would be the best identifier.
Congrats on you pregnancy!!!
I miscarried identical twins back in November, and yes my pregnancy symptoms were definitely magnified. I also tested 5 days before "missed period" and got an immediate dark pregnant line. The biggest thing for me was I KNEW it was twins, I just knew. Always trust your gut.
Being a fraternal twin increases your chance of having fraternal twins. Identical twins are just random, there is not gentic link.
Share your concerns with your OB and hopefully he/she can get you in for are early scan and put your mnd at ease.
I hope this helps, please keep us posted!!
Thank you for the reply. I am very worried since the test was so dark so early. i took the test on the 10th and missed period wasn't until the 19th. I haven't found an OB yet since i need a fetal specialist and I'm having trouble finding one. I hope to at least get an ultrasound next week or the week after.